diff --git a/calculator/.gitignore b/calculator/.gitignore
new file mode 100644
index 00000000..24476c5d
--- /dev/null
+++ b/calculator/.gitignore
@@ -0,0 +1,44 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.packages
+.pub-cache/
+.pub/
+/build/
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release
diff --git a/calculator/.metadata b/calculator/.metadata
new file mode 100644
index 00000000..acfc1cf8
--- /dev/null
+++ b/calculator/.metadata
@@ -0,0 +1,45 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: "6c4930c4ac86fb286f30e31d0ec8bffbcbb9953e"
+  channel: "stable"
+
+project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: 6c4930c4ac86fb286f30e31d0ec8bffbcbb9953e
+      base_revision: 6c4930c4ac86fb286f30e31d0ec8bffbcbb9953e
+    - platform: android
+      create_revision: 6c4930c4ac86fb286f30e31d0ec8bffbcbb9953e
+      base_revision: 6c4930c4ac86fb286f30e31d0ec8bffbcbb9953e
+    - platform: ios
+      create_revision: 6c4930c4ac86fb286f30e31d0ec8bffbcbb9953e
+      base_revision: 6c4930c4ac86fb286f30e31d0ec8bffbcbb9953e
+    - platform: linux
+      create_revision: 6c4930c4ac86fb286f30e31d0ec8bffbcbb9953e
+      base_revision: 6c4930c4ac86fb286f30e31d0ec8bffbcbb9953e
+    - platform: macos
+      create_revision: 6c4930c4ac86fb286f30e31d0ec8bffbcbb9953e
+      base_revision: 6c4930c4ac86fb286f30e31d0ec8bffbcbb9953e
+    - platform: web
+      create_revision: 6c4930c4ac86fb286f30e31d0ec8bffbcbb9953e
+      base_revision: 6c4930c4ac86fb286f30e31d0ec8bffbcbb9953e
+    - platform: windows
+      create_revision: 6c4930c4ac86fb286f30e31d0ec8bffbcbb9953e
+      base_revision: 6c4930c4ac86fb286f30e31d0ec8bffbcbb9953e
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'
diff --git a/calculator/README.md b/calculator/README.md
new file mode 100644
index 00000000..d411a193
--- /dev/null
+++ b/calculator/README.md
@@ -0,0 +1,20 @@
+# calculator
+
+A simple calculator app.
+
+## Demo
+
+ +
+## Getting Started
+
+This project is a starting point for a Flutter application.
+
+A few resources to get you started if this is your first Flutter project:
+
+- [Lab: Write your first Flutter app](https://docs.flutter.dev/get-started/codelab)
+- [Cookbook: Useful Flutter samples](https://docs.flutter.dev/cookbook)
+
+For help getting started with Flutter development, view the
+[online documentation](https://docs.flutter.dev/), which offers tutorials,
+samples, guidance on mobile development, and a full API reference.
diff --git a/calculator/analysis_options.yaml b/calculator/analysis_options.yaml
new file mode 100644
index 00000000..0d290213
--- /dev/null
+++ b/calculator/analysis_options.yaml
@@ -0,0 +1,28 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at https://dart.dev/lints.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options
diff --git a/calculator/android/.gitignore b/calculator/android/.gitignore
new file mode 100644
index 00000000..6f568019
--- /dev/null
+++ b/calculator/android/.gitignore
@@ -0,0 +1,13 @@
+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
+key.properties
+**/*.keystore
+**/*.jks
diff --git a/calculator/android/app/build.gradle b/calculator/android/app/build.gradle
new file mode 100644
index 00000000..f8f844b3
--- /dev/null
+++ b/calculator/android/app/build.gradle
@@ -0,0 +1,67 @@
+plugins {
+    id "com.android.application"
+    id "kotlin-android"
+    id "dev.flutter.flutter-gradle-plugin"
+}
+
+def localProperties = new Properties()
+def localPropertiesFile = rootProject.file('local.properties')
+if (localPropertiesFile.exists()) {
+    localPropertiesFile.withReader('UTF-8') { reader ->
+        localProperties.load(reader)
+    }
+}
+
+def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
+if (flutterVersionCode == null) {
+    flutterVersionCode = '1'
+}
+
+def flutterVersionName = localProperties.getProperty('flutter.versionName')
+if (flutterVersionName == null) {
+    flutterVersionName = '1.0'
+}
+
+android {
+    namespace "com.example.calculator"
+    compileSdkVersion flutter.compileSdkVersion
+    ndkVersion flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+    }
+
+    defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId "com.example.calculator"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
+        minSdkVersion flutter.minSdkVersion
+        targetSdkVersion flutter.targetSdkVersion
+        versionCode flutterVersionCode.toInteger()
+        versionName flutterVersionName
+    }
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig signingConfigs.debug
+        }
+    }
+}
+
+flutter {
+    source '../..'
+}
+
+dependencies {}
diff --git a/calculator/android/app/src/debug/AndroidManifest.xml b/calculator/android/app/src/debug/AndroidManifest.xml
new file mode 100644
index 00000000..399f6981
--- /dev/null
+++ b/calculator/android/app/src/debug/AndroidManifest.xml
@@ -0,0 +1,7 @@
+
+    
+    
+
diff --git a/calculator/android/app/src/main/AndroidManifest.xml b/calculator/android/app/src/main/AndroidManifest.xml
new file mode 100644
index 00000000..01ee9c6f
--- /dev/null
+++ b/calculator/android/app/src/main/AndroidManifest.xml
@@ -0,0 +1,33 @@
+
+    
+        
+            
+            
+            
+                
+                
+            
+        
+        
+        
+    
+
diff --git a/calculator/android/app/src/main/kotlin/com/example/calculator/MainActivity.kt b/calculator/android/app/src/main/kotlin/com/example/calculator/MainActivity.kt
new file mode 100644
index 00000000..a7921177
--- /dev/null
+++ b/calculator/android/app/src/main/kotlin/com/example/calculator/MainActivity.kt
@@ -0,0 +1,6 @@
+package com.example.calculator
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity: FlutterActivity() {
+}
diff --git a/calculator/android/app/src/main/res/drawable-v21/launch_background.xml b/calculator/android/app/src/main/res/drawable-v21/launch_background.xml
new file mode 100644
index 00000000..f74085f3
--- /dev/null
+++ b/calculator/android/app/src/main/res/drawable-v21/launch_background.xml
@@ -0,0 +1,12 @@
+
+
+
+
+
+## Getting Started
+
+This project is a starting point for a Flutter application.
+
+A few resources to get you started if this is your first Flutter project:
+
+- [Lab: Write your first Flutter app](https://docs.flutter.dev/get-started/codelab)
+- [Cookbook: Useful Flutter samples](https://docs.flutter.dev/cookbook)
+
+For help getting started with Flutter development, view the
+[online documentation](https://docs.flutter.dev/), which offers tutorials,
+samples, guidance on mobile development, and a full API reference.
diff --git a/calculator/analysis_options.yaml b/calculator/analysis_options.yaml
new file mode 100644
index 00000000..0d290213
--- /dev/null
+++ b/calculator/analysis_options.yaml
@@ -0,0 +1,28 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at https://dart.dev/lints.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options
diff --git a/calculator/android/.gitignore b/calculator/android/.gitignore
new file mode 100644
index 00000000..6f568019
--- /dev/null
+++ b/calculator/android/.gitignore
@@ -0,0 +1,13 @@
+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
+key.properties
+**/*.keystore
+**/*.jks
diff --git a/calculator/android/app/build.gradle b/calculator/android/app/build.gradle
new file mode 100644
index 00000000..f8f844b3
--- /dev/null
+++ b/calculator/android/app/build.gradle
@@ -0,0 +1,67 @@
+plugins {
+    id "com.android.application"
+    id "kotlin-android"
+    id "dev.flutter.flutter-gradle-plugin"
+}
+
+def localProperties = new Properties()
+def localPropertiesFile = rootProject.file('local.properties')
+if (localPropertiesFile.exists()) {
+    localPropertiesFile.withReader('UTF-8') { reader ->
+        localProperties.load(reader)
+    }
+}
+
+def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
+if (flutterVersionCode == null) {
+    flutterVersionCode = '1'
+}
+
+def flutterVersionName = localProperties.getProperty('flutter.versionName')
+if (flutterVersionName == null) {
+    flutterVersionName = '1.0'
+}
+
+android {
+    namespace "com.example.calculator"
+    compileSdkVersion flutter.compileSdkVersion
+    ndkVersion flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+    }
+
+    defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId "com.example.calculator"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
+        minSdkVersion flutter.minSdkVersion
+        targetSdkVersion flutter.targetSdkVersion
+        versionCode flutterVersionCode.toInteger()
+        versionName flutterVersionName
+    }
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig signingConfigs.debug
+        }
+    }
+}
+
+flutter {
+    source '../..'
+}
+
+dependencies {}
diff --git a/calculator/android/app/src/debug/AndroidManifest.xml b/calculator/android/app/src/debug/AndroidManifest.xml
new file mode 100644
index 00000000..399f6981
--- /dev/null
+++ b/calculator/android/app/src/debug/AndroidManifest.xml
@@ -0,0 +1,7 @@
+
+    
+    
+
diff --git a/calculator/android/app/src/main/AndroidManifest.xml b/calculator/android/app/src/main/AndroidManifest.xml
new file mode 100644
index 00000000..01ee9c6f
--- /dev/null
+++ b/calculator/android/app/src/main/AndroidManifest.xml
@@ -0,0 +1,33 @@
+
+    
+        
+            
+            
+            
+                
+                
+            
+        
+        
+        
+    
+
diff --git a/calculator/android/app/src/main/kotlin/com/example/calculator/MainActivity.kt b/calculator/android/app/src/main/kotlin/com/example/calculator/MainActivity.kt
new file mode 100644
index 00000000..a7921177
--- /dev/null
+++ b/calculator/android/app/src/main/kotlin/com/example/calculator/MainActivity.kt
@@ -0,0 +1,6 @@
+package com.example.calculator
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity: FlutterActivity() {
+}
diff --git a/calculator/android/app/src/main/res/drawable-v21/launch_background.xml b/calculator/android/app/src/main/res/drawable-v21/launch_background.xml
new file mode 100644
index 00000000..f74085f3
--- /dev/null
+++ b/calculator/android/app/src/main/res/drawable-v21/launch_background.xml
@@ -0,0 +1,12 @@
+
+
+
+    +
+    
+    
+
diff --git a/calculator/android/app/src/main/res/drawable/launch_background.xml b/calculator/android/app/src/main/res/drawable/launch_background.xml
new file mode 100644
index 00000000..304732f8
--- /dev/null
+++ b/calculator/android/app/src/main/res/drawable/launch_background.xml
@@ -0,0 +1,12 @@
+
+
+
+
+
+    
+    
+
diff --git a/calculator/android/app/src/main/res/mipmap-hdpi/ic_launcher.png b/calculator/android/app/src/main/res/mipmap-hdpi/ic_launcher.png
new file mode 100644
index 00000000..db77bb4b
Binary files /dev/null and b/calculator/android/app/src/main/res/mipmap-hdpi/ic_launcher.png differ
diff --git a/calculator/android/app/src/main/res/mipmap-mdpi/ic_launcher.png b/calculator/android/app/src/main/res/mipmap-mdpi/ic_launcher.png
new file mode 100644
index 00000000..17987b79
Binary files /dev/null and b/calculator/android/app/src/main/res/mipmap-mdpi/ic_launcher.png differ
diff --git a/calculator/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/calculator/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png
new file mode 100644
index 00000000..09d43914
Binary files /dev/null and b/calculator/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png differ
diff --git a/calculator/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/calculator/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
new file mode 100644
index 00000000..d5f1c8d3
Binary files /dev/null and b/calculator/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png differ
diff --git a/calculator/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/calculator/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
new file mode 100644
index 00000000..4d6372ee
Binary files /dev/null and b/calculator/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png differ
diff --git a/calculator/android/app/src/main/res/values-night/styles.xml b/calculator/android/app/src/main/res/values-night/styles.xml
new file mode 100644
index 00000000..06952be7
--- /dev/null
+++ b/calculator/android/app/src/main/res/values-night/styles.xml
@@ -0,0 +1,18 @@
+
+
+    
+    
+    
+    
+
diff --git a/calculator/android/app/src/main/res/values/styles.xml b/calculator/android/app/src/main/res/values/styles.xml
new file mode 100644
index 00000000..cb1ef880
--- /dev/null
+++ b/calculator/android/app/src/main/res/values/styles.xml
@@ -0,0 +1,18 @@
+
+
+    
+    
+    
+    
+
diff --git a/calculator/android/app/src/profile/AndroidManifest.xml b/calculator/android/app/src/profile/AndroidManifest.xml
new file mode 100644
index 00000000..399f6981
--- /dev/null
+++ b/calculator/android/app/src/profile/AndroidManifest.xml
@@ -0,0 +1,7 @@
+
+    
+    
+
diff --git a/calculator/android/build.gradle b/calculator/android/build.gradle
new file mode 100644
index 00000000..f7eb7f63
--- /dev/null
+++ b/calculator/android/build.gradle
@@ -0,0 +1,31 @@
+buildscript {
+    ext.kotlin_version = '1.7.10'
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:7.3.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.buildDir = '../build'
+subprojects {
+    project.buildDir = "${rootProject.buildDir}/${project.name}"
+}
+subprojects {
+    project.evaluationDependsOn(':app')
+}
+
+tasks.register("clean", Delete) {
+    delete rootProject.buildDir
+}
diff --git a/calculator/android/gradle.properties b/calculator/android/gradle.properties
new file mode 100644
index 00000000..94adc3a3
--- /dev/null
+++ b/calculator/android/gradle.properties
@@ -0,0 +1,3 @@
+org.gradle.jvmargs=-Xmx1536M
+android.useAndroidX=true
+android.enableJetifier=true
diff --git a/calculator/android/gradle/wrapper/gradle-wrapper.properties b/calculator/android/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..3c472b99
--- /dev/null
+++ b/calculator/android/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-all.zip
diff --git a/calculator/android/settings.gradle b/calculator/android/settings.gradle
new file mode 100644
index 00000000..55c4ca8b
--- /dev/null
+++ b/calculator/android/settings.gradle
@@ -0,0 +1,20 @@
+pluginManagement {
+    def flutterSdkPath = {
+        def properties = new Properties()
+        file("local.properties").withInputStream { properties.load(it) }
+        def flutterSdkPath = properties.getProperty("flutter.sdk")
+        assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+        return flutterSdkPath
+    }
+    settings.ext.flutterSdkPath = flutterSdkPath()
+
+    includeBuild("${settings.ext.flutterSdkPath}/packages/flutter_tools/gradle")
+
+    plugins {
+        id "dev.flutter.flutter-gradle-plugin" version "1.0.0" apply false
+    }
+}
+
+include ":app"
+
+apply from: "${settings.ext.flutterSdkPath}/packages/flutter_tools/gradle/app_plugin_loader.gradle"
diff --git a/calculator/demo.gif b/calculator/demo.gif
new file mode 100644
index 00000000..e25d005c
Binary files /dev/null and b/calculator/demo.gif differ
diff --git a/calculator/ios/.gitignore b/calculator/ios/.gitignore
new file mode 100644
index 00000000..7a7f9873
--- /dev/null
+++ b/calculator/ios/.gitignore
@@ -0,0 +1,34 @@
+**/dgph
+*.mode1v3
+*.mode2v3
+*.moved-aside
+*.pbxuser
+*.perspectivev3
+**/*sync/
+.sconsign.dblite
+.tags*
+**/.vagrant/
+**/DerivedData/
+Icon?
+**/Pods/
+**/.symlinks/
+profile
+xcuserdata
+**/.generated/
+Flutter/App.framework
+Flutter/Flutter.framework
+Flutter/Flutter.podspec
+Flutter/Generated.xcconfig
+Flutter/ephemeral/
+Flutter/app.flx
+Flutter/app.zip
+Flutter/flutter_assets/
+Flutter/flutter_export_environment.sh
+ServiceDefinitions.json
+Runner/GeneratedPluginRegistrant.*
+
+# Exceptions to above rules.
+!default.mode1v3
+!default.mode2v3
+!default.pbxuser
+!default.perspectivev3
diff --git a/calculator/ios/Flutter/AppFrameworkInfo.plist b/calculator/ios/Flutter/AppFrameworkInfo.plist
new file mode 100644
index 00000000..9625e105
--- /dev/null
+++ b/calculator/ios/Flutter/AppFrameworkInfo.plist
@@ -0,0 +1,26 @@
+
+
+
+
+  CFBundleDevelopmentRegion
+  en
+  CFBundleExecutable
+  App
+  CFBundleIdentifier
+  io.flutter.flutter.app
+  CFBundleInfoDictionaryVersion
+  6.0
+  CFBundleName
+  App
+  CFBundlePackageType
+  FMWK
+  CFBundleShortVersionString
+  1.0
+  CFBundleSignature
+  ????
+  CFBundleVersion
+  1.0
+  MinimumOSVersion
+  11.0
+
+
diff --git a/calculator/ios/Flutter/Debug.xcconfig b/calculator/ios/Flutter/Debug.xcconfig
new file mode 100644
index 00000000..592ceee8
--- /dev/null
+++ b/calculator/ios/Flutter/Debug.xcconfig
@@ -0,0 +1 @@
+#include "Generated.xcconfig"
diff --git a/calculator/ios/Flutter/Release.xcconfig b/calculator/ios/Flutter/Release.xcconfig
new file mode 100644
index 00000000..592ceee8
--- /dev/null
+++ b/calculator/ios/Flutter/Release.xcconfig
@@ -0,0 +1 @@
+#include "Generated.xcconfig"
diff --git a/calculator/ios/Runner.xcodeproj/project.pbxproj b/calculator/ios/Runner.xcodeproj/project.pbxproj
new file mode 100644
index 00000000..6806cd6d
--- /dev/null
+++ b/calculator/ios/Runner.xcodeproj/project.pbxproj
@@ -0,0 +1,614 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 54;
+	objects = {
+
+/* Begin PBXBuildFile section */
+		1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */ = {isa = PBXBuildFile; fileRef = 1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */; };
+		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
+		74858FAF1ED2DC5600515810 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74858FAE1ED2DC5600515810 /* AppDelegate.swift */; };
+		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
+		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
+		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
+		331C808B294A63AB00263BE5 /* RunnerTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 331C807B294A618700263BE5 /* RunnerTests.swift */; };
+/* End PBXBuildFile section */
+
+/* Begin PBXContainerItemProxy section */
+		331C8085294A63A400263BE5 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 97C146E61CF9000F007C117D /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 97C146ED1CF9000F007C117D;
+			remoteInfo = Runner;
+		};
+/* End PBXContainerItemProxy section */
+
+/* Begin PBXCopyFilesBuildPhase section */
+		9705A1C41CF9048500538489 /* Embed Frameworks */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = "";
+			dstSubfolderSpec = 10;
+			files = (
+			);
+			name = "Embed Frameworks";
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXCopyFilesBuildPhase section */
+
+/* Begin PBXFileReference section */
+		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = ""; };
+		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = ""; };
+		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = ""; };
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+		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Release.xcconfig; path = Flutter/Release.xcconfig; sourceTree = ""; };
+		9740EEB21CF90195004384FC /* Debug.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Debug.xcconfig; path = Flutter/Debug.xcconfig; sourceTree = ""; };
+		9740EEB31CF90195004384FC /* Generated.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Generated.xcconfig; path = Flutter/Generated.xcconfig; sourceTree = ""; };
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+		97C146FB1CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = ""; };
+		97C146FD1CF9000F007C117D /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = ""; };
+		97C147001CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = ""; };
+		97C147021CF9000F007C117D /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = ""; };
+		331C807B294A618700263BE5 /* RunnerTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RunnerTests.swift; sourceTree = ""; };
+		331C8081294A63A400263BE5 /* RunnerTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = RunnerTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
+/* End PBXFileReference section */
+
+/* Begin PBXFrameworksBuildPhase section */
+		97C146EB1CF9000F007C117D /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXFrameworksBuildPhase section */
+
+/* Begin PBXGroup section */
+		9740EEB11CF90186004384FC /* Flutter */ = {
+			isa = PBXGroup;
+			children = (
+				3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */,
+				9740EEB21CF90195004384FC /* Debug.xcconfig */,
+				7AFA3C8E1D35360C0083082E /* Release.xcconfig */,
+				9740EEB31CF90195004384FC /* Generated.xcconfig */,
+			);
+			name = Flutter;
+			sourceTree = "";
+		};
+		331C8082294A63A400263BE5 /* RunnerTests */ = {
+			isa = PBXGroup;
+			children = (
+				331C807B294A618700263BE5 /* RunnerTests.swift */,
+			);
+			path = RunnerTests;
+			sourceTree = "";
+		};
+		97C146E51CF9000F007C117D = {
+			isa = PBXGroup;
+			children = (
+				9740EEB11CF90186004384FC /* Flutter */,
+				97C146F01CF9000F007C117D /* Runner */,
+				97C146EF1CF9000F007C117D /* Products */,
+				331C8082294A63A400263BE5 /* RunnerTests */,
+			);
+			sourceTree = "";
+		};
+		97C146EF1CF9000F007C117D /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				97C146EE1CF9000F007C117D /* Runner.app */,
+				331C8081294A63A400263BE5 /* RunnerTests.xctest */,
+			);
+			name = Products;
+			sourceTree = "";
+		};
+		97C146F01CF9000F007C117D /* Runner */ = {
+			isa = PBXGroup;
+			children = (
+				97C146FA1CF9000F007C117D /* Main.storyboard */,
+				97C146FD1CF9000F007C117D /* Assets.xcassets */,
+				97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */,
+				97C147021CF9000F007C117D /* Info.plist */,
+				1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */,
+				1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */,
+				74858FAE1ED2DC5600515810 /* AppDelegate.swift */,
+				74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */,
+			);
+			path = Runner;
+			sourceTree = "";
+		};
+/* End PBXGroup section */
+
+/* Begin PBXNativeTarget section */
+		331C8080294A63A400263BE5 /* RunnerTests */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 331C8087294A63A400263BE5 /* Build configuration list for PBXNativeTarget "RunnerTests" */;
+			buildPhases = (
+				331C807D294A63A400263BE5 /* Sources */,
+				331C807E294A63A400263BE5 /* Frameworks */,
+				331C807F294A63A400263BE5 /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+				331C8086294A63A400263BE5 /* PBXTargetDependency */,
+			);
+			name = RunnerTests;
+			productName = RunnerTests;
+			productReference = 331C8081294A63A400263BE5 /* RunnerTests.xctest */;
+			productType = "com.apple.product-type.bundle.unit-test";
+		};
+		97C146ED1CF9000F007C117D /* Runner */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */;
+			buildPhases = (
+				9740EEB61CF901F6004384FC /* Run Script */,
+				97C146EA1CF9000F007C117D /* Sources */,
+				97C146EB1CF9000F007C117D /* Frameworks */,
+				97C146EC1CF9000F007C117D /* Resources */,
+				9705A1C41CF9048500538489 /* Embed Frameworks */,
+				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = Runner;
+			productName = Runner;
+			productReference = 97C146EE1CF9000F007C117D /* Runner.app */;
+			productType = "com.apple.product-type.application";
+		};
+/* End PBXNativeTarget section */
+
+/* Begin PBXProject section */
+		97C146E61CF9000F007C117D /* Project object */ = {
+			isa = PBXProject;
+			attributes = {
+				BuildIndependentTargetsInParallel = YES;
+				LastUpgradeCheck = 1430;
+				ORGANIZATIONNAME = "";
+				TargetAttributes = {
+					331C8080294A63A400263BE5 = {
+						CreatedOnToolsVersion = 14.0;
+						TestTargetID = 97C146ED1CF9000F007C117D;
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+					97C146ED1CF9000F007C117D = {
+						CreatedOnToolsVersion = 7.3.1;
+						LastSwiftMigration = 1100;
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+				};
+			};
+			buildConfigurationList = 97C146E91CF9000F007C117D /* Build configuration list for PBXProject "Runner" */;
+			compatibilityVersion = "Xcode 9.3";
+			developmentRegion = en;
+			hasScannedForEncodings = 0;
+			knownRegions = (
+				en,
+				Base,
+			);
+			mainGroup = 97C146E51CF9000F007C117D;
+			productRefGroup = 97C146EF1CF9000F007C117D /* Products */;
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+			targets = (
+				97C146ED1CF9000F007C117D /* Runner */,
+				331C8080294A63A400263BE5 /* RunnerTests */,
+			);
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+/* End PBXProject section */
+
+/* Begin PBXResourcesBuildPhase section */
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+			);
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+		};
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+				97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */,
+				97C146FC1CF9000F007C117D /* Main.storyboard in Resources */,
+			);
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+		};
+/* End PBXResourcesBuildPhase section */
+
+/* Begin PBXShellScriptBuildPhase section */
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+			alwaysOutOfDate = 1;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
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+			);
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+			outputPaths = (
+			);
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+			shellPath = /bin/sh;
+			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" embed_and_thin";
+		};
+		9740EEB61CF901F6004384FC /* Run Script */ = {
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+			alwaysOutOfDate = 1;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
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+			outputPaths = (
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+			shellPath = /bin/sh;
+			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" build";
+		};
+/* End PBXShellScriptBuildPhase section */
+
+/* Begin PBXSourcesBuildPhase section */
+		331C807D294A63A400263BE5 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				331C808B294A63AB00263BE5 /* RunnerTests.swift in Sources */,
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+		};
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+			buildActionMask = 2147483647;
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+		};
+/* End PBXSourcesBuildPhase section */
+
+/* Begin PBXTargetDependency section */
+		331C8086294A63A400263BE5 /* PBXTargetDependency */ = {
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+			target = 97C146ED1CF9000F007C117D /* Runner */;
+			targetProxy = 331C8085294A63A400263BE5 /* PBXContainerItemProxy */;
+		};
+/* End PBXTargetDependency section */
+
+/* Begin PBXVariantGroup section */
+		97C146FA1CF9000F007C117D /* Main.storyboard */ = {
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+				97C146FB1CF9000F007C117D /* Base */,
+			);
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+			sourceTree = "";
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+			isa = PBXVariantGroup;
+			children = (
+				97C147001CF9000F007C117D /* Base */,
+			);
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+			sourceTree = "";
+		};
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+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
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+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
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+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				ENABLE_NS_ASSERTIONS = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu99;
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+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				SDKROOT = iphoneos;
+				SUPPORTED_PLATFORMS = iphoneos;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Profile;
+		};
+		249021D4217E4FDB00AE95B9 /* Profile */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CLANG_ENABLE_MODULES = YES;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				ENABLE_BITCODE = NO;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.example.calculator;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+			};
+			name = Profile;
+		};
+		331C8088294A63A400263BE5 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = AE0B7B92F70575B8D7E0D07E /* Pods-RunnerTests.debug.xcconfig */;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				GENERATE_INFOPLIST_FILE = YES;
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.example.calculator.RunnerTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Runner.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/Runner";
+			};
+			name = Debug;
+		};
+		331C8089294A63A400263BE5 /* Release */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 89B67EB44CE7B6631473024E /* Pods-RunnerTests.release.xcconfig */;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				GENERATE_INFOPLIST_FILE = YES;
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.example.calculator.RunnerTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Runner.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/Runner";
+			};
+			name = Release;
+		};
+		331C808A294A63A400263BE5 /* Profile */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 640959BDD8F10B91D80A66BE /* Pods-RunnerTests.profile.xcconfig */;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				GENERATE_INFOPLIST_FILE = YES;
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.example.calculator.RunnerTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Runner.app/$(BUNDLE_EXECUTABLE_FOLDER_PATH)/Runner";
+			};
+			name = Profile;
+		};
+		97C147031CF9000F007C117D /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
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+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = dwarf;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_DYNAMIC_NO_PIC = NO;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_OPTIMIZATION_LEVEL = 0;
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"DEBUG=1",
+					"$(inherited)",
+				);
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
+				MTL_ENABLE_DEBUG_INFO = YES;
+				ONLY_ACTIVE_ARCH = YES;
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+				TARGETED_DEVICE_FAMILY = "1,2";
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+		};
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+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
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+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				ENABLE_NS_ASSERTIONS = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				SDKROOT = iphoneos;
+				SUPPORTED_PLATFORMS = iphoneos;
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
+				TARGETED_DEVICE_FAMILY = "1,2";
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Release;
+		};
+		97C147061CF9000F007C117D /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CLANG_ENABLE_MODULES = YES;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				ENABLE_BITCODE = NO;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.example.calculator;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+			};
+			name = Debug;
+		};
+		97C147071CF9000F007C117D /* Release */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CLANG_ENABLE_MODULES = YES;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				ENABLE_BITCODE = NO;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.example.calculator;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		331C8087294A63A400263BE5 /* Build configuration list for PBXNativeTarget "RunnerTests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				331C8088294A63A400263BE5 /* Debug */,
+				331C8089294A63A400263BE5 /* Release */,
+				331C808A294A63A400263BE5 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		97C146E91CF9000F007C117D /* Build configuration list for PBXProject "Runner" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				97C147031CF9000F007C117D /* Debug */,
+				97C147041CF9000F007C117D /* Release */,
+				249021D3217E4FDB00AE95B9 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				97C147061CF9000F007C117D /* Debug */,
+				97C147071CF9000F007C117D /* Release */,
+				249021D4217E4FDB00AE95B9 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 97C146E61CF9000F007C117D /* Project object */;
+}
diff --git a/calculator/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata b/calculator/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 00000000..919434a6
--- /dev/null
+++ b/calculator/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+
+
+   
+   
+
diff --git a/calculator/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/calculator/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 00000000..18d98100
--- /dev/null
+++ b/calculator/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+
+
+
+
+	IDEDidComputeMac32BitWarning
+	
+
+
diff --git a/calculator/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings b/calculator/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
new file mode 100644
index 00000000..f9b0d7c5
--- /dev/null
+++ b/calculator/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
@@ -0,0 +1,8 @@
+
+
+
+
+	PreviewsEnabled
+	
+
+
diff --git a/calculator/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme b/calculator/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
new file mode 100644
index 00000000..87131a09
--- /dev/null
+++ b/calculator/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
@@ -0,0 +1,98 @@
+
+
+   
+      
+         
+            
+            
+         
+      
+   
+   
+      
+         
+         
+      
+      
+         
+            
+            
+         
+      
+   
+   
+      
+         
+         
+      
+   
+   
+      
+         
+         
+      
+   
+   
+   
+   
+   
+
diff --git a/calculator/ios/Runner.xcworkspace/contents.xcworkspacedata b/calculator/ios/Runner.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 00000000..1d526a16
--- /dev/null
+++ b/calculator/ios/Runner.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+
+
+   
+   
+
diff --git a/calculator/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/calculator/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 00000000..18d98100
--- /dev/null
+++ b/calculator/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+
+
+
+
+	IDEDidComputeMac32BitWarning
+	
+
+
diff --git a/calculator/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings b/calculator/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
new file mode 100644
index 00000000..f9b0d7c5
--- /dev/null
+++ b/calculator/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
@@ -0,0 +1,8 @@
+
+
+
+
+	PreviewsEnabled
+	
+
+
diff --git a/calculator/ios/Runner/AppDelegate.swift b/calculator/ios/Runner/AppDelegate.swift
new file mode 100644
index 00000000..70693e4a
--- /dev/null
+++ b/calculator/ios/Runner/AppDelegate.swift
@@ -0,0 +1,13 @@
+import UIKit
+import Flutter
+
+@UIApplicationMain
+@objc class AppDelegate: FlutterAppDelegate {
+  override func application(
+    _ application: UIApplication,
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
+  ) -> Bool {
+    GeneratedPluginRegistrant.register(with: self)
+    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
+  }
+}
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json
new file mode 100644
index 00000000..d36b1fab
--- /dev/null
+++ b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json
@@ -0,0 +1,122 @@
+{
+  "images" : [
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-20x20@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-29x29@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-40x40@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "Icon-App-60x60@3x.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-20x20@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-29x29@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-40x40@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@1x.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "76x76",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-76x76@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "83.5x83.5",
+      "idiom" : "ipad",
+      "filename" : "Icon-App-83.5x83.5@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "1024x1024",
+      "idiom" : "ios-marketing",
+      "filename" : "Icon-App-1024x1024@1x.png",
+      "scale" : "1x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-1024x1024@1x.png b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-1024x1024@1x.png
new file mode 100644
index 00000000..dc9ada47
Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-1024x1024@1x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@1x.png b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@1x.png
new file mode 100644
index 00000000..7353c41e
Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@1x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@2x.png b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@2x.png
new file mode 100644
index 00000000..797d452e
Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@2x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@3x.png b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@3x.png
new file mode 100644
index 00000000..6ed2d933
Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@3x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@1x.png b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@1x.png
new file mode 100644
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Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@1x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@2x.png b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@2x.png
new file mode 100644
index 00000000..fe730945
Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@2x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@3x.png b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@3x.png
new file mode 100644
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Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@3x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@1x.png b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@1x.png
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Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@1x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@2x.png b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@2x.png
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index 00000000..502f463a
Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@2x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@3x.png b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@3x.png
new file mode 100644
index 00000000..0ec30343
Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@3x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@2x.png b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@2x.png
new file mode 100644
index 00000000..0ec30343
Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@2x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@3x.png b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@3x.png
new file mode 100644
index 00000000..e9f5fea2
Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@3x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@1x.png b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@1x.png
new file mode 100644
index 00000000..84ac32ae
Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@1x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@2x.png b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@2x.png
new file mode 100644
index 00000000..8953cba0
Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@2x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-83.5x83.5@2x.png b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-83.5x83.5@2x.png
new file mode 100644
index 00000000..0467bf12
Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-83.5x83.5@2x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json b/calculator/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json
new file mode 100644
index 00000000..0bedcf2f
--- /dev/null
+++ b/calculator/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json
@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "LaunchImage@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}
diff --git a/calculator/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png b/calculator/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png
new file mode 100644
index 00000000..9da19eac
Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png b/calculator/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png
new file mode 100644
index 00000000..9da19eac
Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png b/calculator/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png
new file mode 100644
index 00000000..9da19eac
Binary files /dev/null and b/calculator/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png differ
diff --git a/calculator/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md b/calculator/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md
new file mode 100644
index 00000000..89c2725b
--- /dev/null
+++ b/calculator/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md
@@ -0,0 +1,5 @@
+# Launch Screen Assets
+
+You can customize the launch screen with your own desired assets by replacing the image files in this directory.
+
+You can also do it by opening your Flutter project's Xcode project with `open ios/Runner.xcworkspace`, selecting `Runner/Assets.xcassets` in the Project Navigator and dropping in the desired images.
\ No newline at end of file
diff --git a/calculator/ios/Runner/Base.lproj/LaunchScreen.storyboard b/calculator/ios/Runner/Base.lproj/LaunchScreen.storyboard
new file mode 100644
index 00000000..f2e259c7
--- /dev/null
+++ b/calculator/ios/Runner/Base.lproj/LaunchScreen.storyboard
@@ -0,0 +1,37 @@
+
+
+    
+        
+        
+    
+    
+        
+        
+            
+                
+                    
+                        
+                        
+                    
+                    
+                        
+                        
+                            
+                            
+                        
+                        
+                        
+                            
+                            
+                        
+                    
+                
+                
+            
+            
+        
+    
+    
+        
+    
+
diff --git a/calculator/ios/Runner/Base.lproj/Main.storyboard b/calculator/ios/Runner/Base.lproj/Main.storyboard
new file mode 100644
index 00000000..f3c28516
--- /dev/null
+++ b/calculator/ios/Runner/Base.lproj/Main.storyboard
@@ -0,0 +1,26 @@
+
+
+    
+        
+        
+    
+    
+        
+        
+            
+                
+                    
+                        
+                        
+                    
+                    
+                        
+                        
+                        
+                    
+                
+                
+            
+        
+    
+
diff --git a/calculator/ios/Runner/Info.plist b/calculator/ios/Runner/Info.plist
new file mode 100644
index 00000000..a6626e60
--- /dev/null
+++ b/calculator/ios/Runner/Info.plist
@@ -0,0 +1,49 @@
+
+
+
+
+	CFBundleDevelopmentRegion
+	$(DEVELOPMENT_LANGUAGE)
+	CFBundleDisplayName
+	Calculator
+	CFBundleExecutable
+	$(EXECUTABLE_NAME)
+	CFBundleIdentifier
+	$(PRODUCT_BUNDLE_IDENTIFIER)
+	CFBundleInfoDictionaryVersion
+	6.0
+	CFBundleName
+	calculator
+	CFBundlePackageType
+	APPL
+	CFBundleShortVersionString
+	$(FLUTTER_BUILD_NAME)
+	CFBundleSignature
+	????
+	CFBundleVersion
+	$(FLUTTER_BUILD_NUMBER)
+	LSRequiresIPhoneOS
+	
+	UILaunchStoryboardName
+	LaunchScreen
+	UIMainStoryboardFile
+	Main
+	UISupportedInterfaceOrientations
+	
+		UIInterfaceOrientationPortrait
+		UIInterfaceOrientationLandscapeLeft
+		UIInterfaceOrientationLandscapeRight
+	
+	UISupportedInterfaceOrientations~ipad
+	
+		UIInterfaceOrientationPortrait
+		UIInterfaceOrientationPortraitUpsideDown
+		UIInterfaceOrientationLandscapeLeft
+		UIInterfaceOrientationLandscapeRight
+	
+	CADisableMinimumFrameDurationOnPhone
+	
+	UIApplicationSupportsIndirectInputEvents
+	
+
+
diff --git a/calculator/ios/Runner/Runner-Bridging-Header.h b/calculator/ios/Runner/Runner-Bridging-Header.h
new file mode 100644
index 00000000..308a2a56
--- /dev/null
+++ b/calculator/ios/Runner/Runner-Bridging-Header.h
@@ -0,0 +1 @@
+#import "GeneratedPluginRegistrant.h"
diff --git a/calculator/ios/RunnerTests/RunnerTests.swift b/calculator/ios/RunnerTests/RunnerTests.swift
new file mode 100644
index 00000000..86a7c3b1
--- /dev/null
+++ b/calculator/ios/RunnerTests/RunnerTests.swift
@@ -0,0 +1,12 @@
+import Flutter
+import UIKit
+import XCTest
+
+class RunnerTests: XCTestCase {
+
+  func testExample() {
+    // If you add code to the Runner application, consider adding tests here.
+    // See https://developer.apple.com/documentation/xctest for more information about using XCTest.
+  }
+
+}
diff --git a/calculator/lib/button.dart b/calculator/lib/button.dart
new file mode 100644
index 00000000..233bd235
--- /dev/null
+++ b/calculator/lib/button.dart
@@ -0,0 +1,40 @@
+import 'package:flutter/material.dart';
+
+class MyButton extends StatelessWidget {
+  final dynamic buttonTapped;
+  final Color? color;
+  final Color? textColor;
+  final String? buttonText;
+
+  const MyButton(
+      {super.key,
+      this.buttonTapped,
+      this.color,
+      this.textColor,
+      this.buttonText});
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      onTap: buttonTapped,
+      child: Padding(
+        padding: const EdgeInsets.all(2),
+        child: ClipRRect(
+          borderRadius: BorderRadius.circular(100),
+          child: Container(
+            color: color,
+            child: Center(
+              child: Text(
+                buttonText!,
+                style: TextStyle(
+                    color: textColor,
+                    fontSize: 24,
+                    fontWeight: FontWeight.bold),
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}
diff --git a/calculator/lib/main.dart b/calculator/lib/main.dart
new file mode 100644
index 00000000..03c4a717
--- /dev/null
+++ b/calculator/lib/main.dart
@@ -0,0 +1,269 @@
+import 'package:flutter/material.dart';
+import 'package:math_expressions/math_expressions.dart';
+import 'package:calculator/button.dart';
+
+void main() {
+  runApp(const MyApp());
+}
+
+class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      theme: ThemeData(
+        colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue),
+        useMaterial3: true,
+      ),
+      home: const MyHomePage(title: 'Calculator'),
+    );
+  }
+}
+
+class MyHomePage extends StatefulWidget {
+  const MyHomePage({super.key, required this.title});
+
+  final String title;
+
+  @override
+  State createState() => _MyHomePageState();
+}
+
+class _MyHomePageState extends State {
+  var userInput = '';
+  var answer = '';
+  var openP = 0;
+
+  final List buttons = [
+    'C',
+    '( )',
+    '%',
+    '/',
+    '7',
+    '8',
+    '9',
+    'x',
+    '4',
+    '5',
+    '6',
+    '-',
+    '1',
+    '2',
+    '3',
+    '+',
+    '+/-',
+    '0',
+    '.',
+    '=',
+  ];
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(
+          widget.title,
+          style: const TextStyle(color: Colors.white),
+        ),
+        backgroundColor: theme.colorScheme.primary,
+      ),
+      body: Column(
+        children: [
+          Expanded(
+            child: Column(
+              children: [
+                Container(
+                  alignment: Alignment.centerRight,
+                  margin: const EdgeInsets.all(20),
+                  child: Text(
+                    userInput,
+                    style: const TextStyle(fontSize: 32),
+                  ),
+                ),
+                Container(
+                  alignment: Alignment.centerRight,
+                  margin: const EdgeInsets.symmetric(horizontal: 20),
+                  child: Text(
+                    answer,
+                    style: const TextStyle(fontSize: 24),
+                  ),
+                ),
+              ],
+            ),
+          ),
+          Container(
+            alignment: Alignment.centerRight,
+            margin: const EdgeInsets.symmetric(horizontal: 20, vertical: 10),
+            padding: const EdgeInsets.all(8),
+            decoration: const BoxDecoration(
+              border: Border(
+                bottom: BorderSide(color: Colors.black12),
+              ),
+            ),
+            child: TextButton(
+              onPressed: () {
+                setState(() {
+                  if (userInput != '') {
+                    userInput = userInput.substring(0, userInput.length - 1);
+                  } else {
+                    userInput = '';
+                  }
+                  try {
+                    parseInput();
+                  } on Error {
+                    answer = '';
+                  } on Exception {
+                    answer = '';
+                  }
+                });
+              },
+              child: const Icon(Icons.backspace),
+            ),
+          ),
+          Expanded(
+            flex: 2,
+            child: GridView.builder(
+              padding: const EdgeInsets.symmetric(horizontal: 20),
+              itemCount: buttons.length,
+              gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
+                  crossAxisCount: 4),
+              itemBuilder: (BuildContext context, int index) {
+                // C (clear) button
+                if (index == 0) {
+                  return MyButton(
+                    buttonTapped: () {
+                      setState(() {
+                        userInput = '';
+                        answer = '';
+                      });
+                    },
+                    color: Colors.white,
+                    textColor: Colors.red,
+                    buttonText: buttons[index],
+                  );
+                  // () button
+                } else if (index == 1) {
+                  return MyButton(
+                    buttonTapped: () {
+                      setState(() {
+                        if (openP == 0) {
+                          setState(() {
+                            openP++;
+                          });
+                          userInput += '(';
+                        } else {
+                          if (isOperator(userInput[userInput.length - 1])) {
+                            setState(() {
+                              openP++;
+                            });
+                            userInput += '(';
+                          } else {
+                            setState(() {
+                              openP--;
+                            });
+                            userInput += ')';
+                          }
+                        }
+                        try {
+                          parseInput();
+                        } on Error {
+                          answer = '';
+                        } on Exception {
+                          answer = '';
+                        }
+                      });
+                    },
+                    color: theme.colorScheme.secondary,
+                    textColor: Colors.white,
+                    buttonText: buttons[index],
+                  );
+                  //+/- button
+                } else if (index == 16) {
+                  return MyButton(
+                    buttonTapped: () {
+                      setState(() {
+                        for (int i = userInput.length - 1; i >= 0; i--) {
+                          if (isOperator(userInput[i])) {
+                            userInput =
+                                '${userInput.substring(0, i + 1)}-${userInput.substring(i + 1, userInput.length)}';
+                            userInput = userInput.replaceAll('--', '+');
+                            userInput = userInput.replaceAll('-+', '-');
+                            userInput = userInput.replaceAll('+-', '-');
+                            break;
+                          } else if (i == 0) {
+                            userInput = '-$userInput';
+                          }
+                        }
+                        parseInput();
+                      });
+                    },
+                    color: Colors.white,
+                    textColor: theme.colorScheme.primary,
+                    buttonText: buttons[index],
+                  );
+                  // = button
+                } else if (index == 19) {
+                  return MyButton(
+                    buttonTapped: () {
+                      setState(() {
+                        userInput = answer;
+                        answer = '';
+                      });
+                    },
+                    color: theme.colorScheme.primary,
+                    textColor: Colors.white,
+                    buttonText: buttons[index],
+                  );
+                } else {
+                  return MyButton(
+                    buttonTapped: () {
+                      setState(() {
+                        userInput += buttons[index];
+                        try {
+                          parseInput();
+                        } on Error {
+                          answer = '';
+                        } on Exception {
+                          answer = '';
+                        }
+                      });
+                    },
+                    color: isOperator(buttons[index])
+                        ? theme.colorScheme.secondary
+                        : Colors.white,
+                    textColor: isOperator(buttons[index])
+                        ? Colors.white
+                        : theme.colorScheme.primary,
+                    buttonText: buttons[index],
+                  );
+                }
+              },
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
+  bool isOperator(String label) {
+    return label == '/' ||
+        label == 'x' ||
+        label == '-' ||
+        label == '+' ||
+        label == '=' ||
+        label == '(' ||
+        label == '%';
+  }
+
+  void parseInput() {
+    String finalInput = userInput.replaceAll('x', '*');
+    Parser p = Parser();
+    Expression exp = p.parse(finalInput);
+    ContextModel cm = ContextModel();
+    double eval = exp.evaluate(EvaluationType.REAL, cm);
+    answer = eval.toString();
+  }
+}
diff --git a/calculator/linux/.gitignore b/calculator/linux/.gitignore
new file mode 100644
index 00000000..d3896c98
--- /dev/null
+++ b/calculator/linux/.gitignore
@@ -0,0 +1 @@
+flutter/ephemeral
diff --git a/calculator/linux/CMakeLists.txt b/calculator/linux/CMakeLists.txt
new file mode 100644
index 00000000..7ec4b75c
--- /dev/null
+++ b/calculator/linux/CMakeLists.txt
@@ -0,0 +1,139 @@
+# Project-level configuration.
+cmake_minimum_required(VERSION 3.10)
+project(runner LANGUAGES CXX)
+
+# The name of the executable created for the application. Change this to change
+# the on-disk name of your application.
+set(BINARY_NAME "calculator")
+# The unique GTK application identifier for this application. See:
+# https://wiki.gnome.org/HowDoI/ChooseApplicationID
+set(APPLICATION_ID "com.example.calculator")
+
+# Explicitly opt in to modern CMake behaviors to avoid warnings with recent
+# versions of CMake.
+cmake_policy(SET CMP0063 NEW)
+
+# Load bundled libraries from the lib/ directory relative to the binary.
+set(CMAKE_INSTALL_RPATH "$ORIGIN/lib")
+
+# Root filesystem for cross-building.
+if(FLUTTER_TARGET_PLATFORM_SYSROOT)
+  set(CMAKE_SYSROOT ${FLUTTER_TARGET_PLATFORM_SYSROOT})
+  set(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT})
+  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+  set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+endif()
+
+# Define build configuration options.
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+  set(CMAKE_BUILD_TYPE "Debug" CACHE
+    STRING "Flutter build mode" FORCE)
+  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+    "Debug" "Profile" "Release")
+endif()
+
+# Compilation settings that should be applied to most targets.
+#
+# Be cautious about adding new options here, as plugins use this function by
+# default. In most cases, you should add new options to specific targets instead
+# of modifying this function.
+function(APPLY_STANDARD_SETTINGS TARGET)
+  target_compile_features(${TARGET} PUBLIC cxx_std_14)
+  target_compile_options(${TARGET} PRIVATE -Wall -Werror)
+  target_compile_options(${TARGET} PRIVATE "$<$>:-O3>")
+  target_compile_definitions(${TARGET} PRIVATE "$<$>:NDEBUG>")
+endfunction()
+
+# Flutter library and tool build rules.
+set(FLUTTER_MANAGED_DIR "${CMAKE_CURRENT_SOURCE_DIR}/flutter")
+add_subdirectory(${FLUTTER_MANAGED_DIR})
+
+# System-level dependencies.
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
+
+add_definitions(-DAPPLICATION_ID="${APPLICATION_ID}")
+
+# Define the application target. To change its name, change BINARY_NAME above,
+# not the value here, or `flutter run` will no longer work.
+#
+# Any new source files that you add to the application should be added here.
+add_executable(${BINARY_NAME}
+  "main.cc"
+  "my_application.cc"
+  "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc"
+)
+
+# Apply the standard set of build settings. This can be removed for applications
+# that need different build settings.
+apply_standard_settings(${BINARY_NAME})
+
+# Add dependency libraries. Add any application-specific dependencies here.
+target_link_libraries(${BINARY_NAME} PRIVATE flutter)
+target_link_libraries(${BINARY_NAME} PRIVATE PkgConfig::GTK)
+
+# Run the Flutter tool portions of the build. This must not be removed.
+add_dependencies(${BINARY_NAME} flutter_assemble)
+
+# Only the install-generated bundle's copy of the executable will launch
+# correctly, since the resources must in the right relative locations. To avoid
+# people trying to run the unbundled copy, put it in a subdirectory instead of
+# the default top-level location.
+set_target_properties(${BINARY_NAME}
+  PROPERTIES
+  RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/intermediates_do_not_run"
+)
+
+
+# Generated plugin build rules, which manage building the plugins and adding
+# them to the application.
+include(flutter/generated_plugins.cmake)
+
+
+# === Installation ===
+# By default, "installing" just makes a relocatable bundle in the build
+# directory.
+set(BUILD_BUNDLE_DIR "${PROJECT_BINARY_DIR}/bundle")
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+  set(CMAKE_INSTALL_PREFIX "${BUILD_BUNDLE_DIR}" CACHE PATH "..." FORCE)
+endif()
+
+# Start with a clean build bundle directory every time.
+install(CODE "
+  file(REMOVE_RECURSE \"${BUILD_BUNDLE_DIR}/\")
+  " COMPONENT Runtime)
+
+set(INSTALL_BUNDLE_DATA_DIR "${CMAKE_INSTALL_PREFIX}/data")
+set(INSTALL_BUNDLE_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib")
+
+install(TARGETS ${BINARY_NAME} RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_ICU_DATA_FILE}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+  COMPONENT Runtime)
+
+foreach(bundled_library ${PLUGIN_BUNDLED_LIBRARIES})
+  install(FILES "${bundled_library}"
+    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endforeach(bundled_library)
+
+# Fully re-copy the assets directory on each build to avoid having stale files
+# from a previous install.
+set(FLUTTER_ASSET_DIR_NAME "flutter_assets")
+install(CODE "
+  file(REMOVE_RECURSE \"${INSTALL_BUNDLE_DATA_DIR}/${FLUTTER_ASSET_DIR_NAME}\")
+  " COMPONENT Runtime)
+install(DIRECTORY "${PROJECT_BUILD_DIR}/${FLUTTER_ASSET_DIR_NAME}"
+  DESTINATION "${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)
+
+# Install the AOT library on non-Debug builds only.
+if(NOT CMAKE_BUILD_TYPE MATCHES "Debug")
+  install(FILES "${AOT_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endif()
diff --git a/calculator/linux/flutter/CMakeLists.txt b/calculator/linux/flutter/CMakeLists.txt
new file mode 100644
index 00000000..d5bd0164
--- /dev/null
+++ b/calculator/linux/flutter/CMakeLists.txt
@@ -0,0 +1,88 @@
+# This file controls Flutter-level build steps. It should not be edited.
+cmake_minimum_required(VERSION 3.10)
+
+set(EPHEMERAL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/ephemeral")
+
+# Configuration provided via flutter tool.
+include(${EPHEMERAL_DIR}/generated_config.cmake)
+
+# TODO: Move the rest of this into files in ephemeral. See
+# https://github.com/flutter/flutter/issues/57146.
+
+# Serves the same purpose as list(TRANSFORM ... PREPEND ...),
+# which isn't available in 3.10.
+function(list_prepend LIST_NAME PREFIX)
+    set(NEW_LIST "")
+    foreach(element ${${LIST_NAME}})
+        list(APPEND NEW_LIST "${PREFIX}${element}")
+    endforeach(element)
+    set(${LIST_NAME} "${NEW_LIST}" PARENT_SCOPE)
+endfunction()
+
+# === Flutter Library ===
+# System-level dependencies.
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
+pkg_check_modules(GLIB REQUIRED IMPORTED_TARGET glib-2.0)
+pkg_check_modules(GIO REQUIRED IMPORTED_TARGET gio-2.0)
+
+set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/libflutter_linux_gtk.so")
+
+# Published to parent scope for install step.
+set(FLUTTER_LIBRARY ${FLUTTER_LIBRARY} PARENT_SCOPE)
+set(FLUTTER_ICU_DATA_FILE "${EPHEMERAL_DIR}/icudtl.dat" PARENT_SCOPE)
+set(PROJECT_BUILD_DIR "${PROJECT_DIR}/build/" PARENT_SCOPE)
+set(AOT_LIBRARY "${PROJECT_DIR}/build/lib/libapp.so" PARENT_SCOPE)
+
+list(APPEND FLUTTER_LIBRARY_HEADERS
+  "fl_basic_message_channel.h"
+  "fl_binary_codec.h"
+  "fl_binary_messenger.h"
+  "fl_dart_project.h"
+  "fl_engine.h"
+  "fl_json_message_codec.h"
+  "fl_json_method_codec.h"
+  "fl_message_codec.h"
+  "fl_method_call.h"
+  "fl_method_channel.h"
+  "fl_method_codec.h"
+  "fl_method_response.h"
+  "fl_plugin_registrar.h"
+  "fl_plugin_registry.h"
+  "fl_standard_message_codec.h"
+  "fl_standard_method_codec.h"
+  "fl_string_codec.h"
+  "fl_value.h"
+  "fl_view.h"
+  "flutter_linux.h"
+)
+list_prepend(FLUTTER_LIBRARY_HEADERS "${EPHEMERAL_DIR}/flutter_linux/")
+add_library(flutter INTERFACE)
+target_include_directories(flutter INTERFACE
+  "${EPHEMERAL_DIR}"
+)
+target_link_libraries(flutter INTERFACE "${FLUTTER_LIBRARY}")
+target_link_libraries(flutter INTERFACE
+  PkgConfig::GTK
+  PkgConfig::GLIB
+  PkgConfig::GIO
+)
+add_dependencies(flutter flutter_assemble)
+
+# === Flutter tool backend ===
+# _phony_ is a non-existent file to force this command to run every time,
+# since currently there's no way to get a full input/output list from the
+# flutter tool.
+add_custom_command(
+  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
+    ${CMAKE_CURRENT_BINARY_DIR}/_phony_
+  COMMAND ${CMAKE_COMMAND} -E env
+    ${FLUTTER_TOOL_ENVIRONMENT}
+    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.sh"
+      ${FLUTTER_TARGET_PLATFORM} ${CMAKE_BUILD_TYPE}
+  VERBATIM
+)
+add_custom_target(flutter_assemble DEPENDS
+  "${FLUTTER_LIBRARY}"
+  ${FLUTTER_LIBRARY_HEADERS}
+)
diff --git a/calculator/linux/flutter/generated_plugin_registrant.cc b/calculator/linux/flutter/generated_plugin_registrant.cc
new file mode 100644
index 00000000..e71a16d2
--- /dev/null
+++ b/calculator/linux/flutter/generated_plugin_registrant.cc
@@ -0,0 +1,11 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#include "generated_plugin_registrant.h"
+
+
+void fl_register_plugins(FlPluginRegistry* registry) {
+}
diff --git a/calculator/linux/flutter/generated_plugin_registrant.h b/calculator/linux/flutter/generated_plugin_registrant.h
new file mode 100644
index 00000000..e0f0a47b
--- /dev/null
+++ b/calculator/linux/flutter/generated_plugin_registrant.h
@@ -0,0 +1,15 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#ifndef GENERATED_PLUGIN_REGISTRANT_
+#define GENERATED_PLUGIN_REGISTRANT_
+
+#include 
+
+// Registers Flutter plugins.
+void fl_register_plugins(FlPluginRegistry* registry);
+
+#endif  // GENERATED_PLUGIN_REGISTRANT_
diff --git a/calculator/linux/flutter/generated_plugins.cmake b/calculator/linux/flutter/generated_plugins.cmake
new file mode 100644
index 00000000..2e1de87a
--- /dev/null
+++ b/calculator/linux/flutter/generated_plugins.cmake
@@ -0,0 +1,23 @@
+#
+# Generated file, do not edit.
+#
+
+list(APPEND FLUTTER_PLUGIN_LIST
+)
+
+list(APPEND FLUTTER_FFI_PLUGIN_LIST
+)
+
+set(PLUGIN_BUNDLED_LIBRARIES)
+
+foreach(plugin ${FLUTTER_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${plugin}/linux plugins/${plugin})
+  target_link_libraries(${BINARY_NAME} PRIVATE ${plugin}_plugin)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES $)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${plugin}_bundled_libraries})
+endforeach(plugin)
+
+foreach(ffi_plugin ${FLUTTER_FFI_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${ffi_plugin}/linux plugins/${ffi_plugin})
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${ffi_plugin}_bundled_libraries})
+endforeach(ffi_plugin)
diff --git a/calculator/linux/main.cc b/calculator/linux/main.cc
new file mode 100644
index 00000000..e7c5c543
--- /dev/null
+++ b/calculator/linux/main.cc
@@ -0,0 +1,6 @@
+#include "my_application.h"
+
+int main(int argc, char** argv) {
+  g_autoptr(MyApplication) app = my_application_new();
+  return g_application_run(G_APPLICATION(app), argc, argv);
+}
diff --git a/calculator/linux/my_application.cc b/calculator/linux/my_application.cc
new file mode 100644
index 00000000..5d179bab
--- /dev/null
+++ b/calculator/linux/my_application.cc
@@ -0,0 +1,104 @@
+#include "my_application.h"
+
+#include 
+#ifdef GDK_WINDOWING_X11
+#include 
+#endif
+
+#include "flutter/generated_plugin_registrant.h"
+
+struct _MyApplication {
+  GtkApplication parent_instance;
+  char** dart_entrypoint_arguments;
+};
+
+G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)
+
+// Implements GApplication::activate.
+static void my_application_activate(GApplication* application) {
+  MyApplication* self = MY_APPLICATION(application);
+  GtkWindow* window =
+      GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));
+
+  // Use a header bar when running in GNOME as this is the common style used
+  // by applications and is the setup most users will be using (e.g. Ubuntu
+  // desktop).
+  // If running on X and not using GNOME then just use a traditional title bar
+  // in case the window manager does more exotic layout, e.g. tiling.
+  // If running on Wayland assume the header bar will work (may need changing
+  // if future cases occur).
+  gboolean use_header_bar = TRUE;
+#ifdef GDK_WINDOWING_X11
+  GdkScreen* screen = gtk_window_get_screen(window);
+  if (GDK_IS_X11_SCREEN(screen)) {
+    const gchar* wm_name = gdk_x11_screen_get_window_manager_name(screen);
+    if (g_strcmp0(wm_name, "GNOME Shell") != 0) {
+      use_header_bar = FALSE;
+    }
+  }
+#endif
+  if (use_header_bar) {
+    GtkHeaderBar* header_bar = GTK_HEADER_BAR(gtk_header_bar_new());
+    gtk_widget_show(GTK_WIDGET(header_bar));
+    gtk_header_bar_set_title(header_bar, "calculator");
+    gtk_header_bar_set_show_close_button(header_bar, TRUE);
+    gtk_window_set_titlebar(window, GTK_WIDGET(header_bar));
+  } else {
+    gtk_window_set_title(window, "calculator");
+  }
+
+  gtk_window_set_default_size(window, 1280, 720);
+  gtk_widget_show(GTK_WIDGET(window));
+
+  g_autoptr(FlDartProject) project = fl_dart_project_new();
+  fl_dart_project_set_dart_entrypoint_arguments(project, self->dart_entrypoint_arguments);
+
+  FlView* view = fl_view_new(project);
+  gtk_widget_show(GTK_WIDGET(view));
+  gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(view));
+
+  fl_register_plugins(FL_PLUGIN_REGISTRY(view));
+
+  gtk_widget_grab_focus(GTK_WIDGET(view));
+}
+
+// Implements GApplication::local_command_line.
+static gboolean my_application_local_command_line(GApplication* application, gchar*** arguments, int* exit_status) {
+  MyApplication* self = MY_APPLICATION(application);
+  // Strip out the first argument as it is the binary name.
+  self->dart_entrypoint_arguments = g_strdupv(*arguments + 1);
+
+  g_autoptr(GError) error = nullptr;
+  if (!g_application_register(application, nullptr, &error)) {
+     g_warning("Failed to register: %s", error->message);
+     *exit_status = 1;
+     return TRUE;
+  }
+
+  g_application_activate(application);
+  *exit_status = 0;
+
+  return TRUE;
+}
+
+// Implements GObject::dispose.
+static void my_application_dispose(GObject* object) {
+  MyApplication* self = MY_APPLICATION(object);
+  g_clear_pointer(&self->dart_entrypoint_arguments, g_strfreev);
+  G_OBJECT_CLASS(my_application_parent_class)->dispose(object);
+}
+
+static void my_application_class_init(MyApplicationClass* klass) {
+  G_APPLICATION_CLASS(klass)->activate = my_application_activate;
+  G_APPLICATION_CLASS(klass)->local_command_line = my_application_local_command_line;
+  G_OBJECT_CLASS(klass)->dispose = my_application_dispose;
+}
+
+static void my_application_init(MyApplication* self) {}
+
+MyApplication* my_application_new() {
+  return MY_APPLICATION(g_object_new(my_application_get_type(),
+                                     "application-id", APPLICATION_ID,
+                                     "flags", G_APPLICATION_NON_UNIQUE,
+                                     nullptr));
+}
diff --git a/calculator/linux/my_application.h b/calculator/linux/my_application.h
new file mode 100644
index 00000000..72271d5e
--- /dev/null
+++ b/calculator/linux/my_application.h
@@ -0,0 +1,18 @@
+#ifndef FLUTTER_MY_APPLICATION_H_
+#define FLUTTER_MY_APPLICATION_H_
+
+#include 
+
+G_DECLARE_FINAL_TYPE(MyApplication, my_application, MY, APPLICATION,
+                     GtkApplication)
+
+/**
+ * my_application_new:
+ *
+ * Creates a new Flutter-based application.
+ *
+ * Returns: a new #MyApplication.
+ */
+MyApplication* my_application_new();
+
+#endif  // FLUTTER_MY_APPLICATION_H_
diff --git a/calculator/macos/.gitignore b/calculator/macos/.gitignore
new file mode 100644
index 00000000..746adbb6
--- /dev/null
+++ b/calculator/macos/.gitignore
@@ -0,0 +1,7 @@
+# Flutter-related
+**/Flutter/ephemeral/
+**/Pods/
+
+# Xcode-related
+**/dgph
+**/xcuserdata/
diff --git a/calculator/macos/Flutter/Flutter-Debug.xcconfig b/calculator/macos/Flutter/Flutter-Debug.xcconfig
new file mode 100644
index 00000000..c2efd0b6
--- /dev/null
+++ b/calculator/macos/Flutter/Flutter-Debug.xcconfig
@@ -0,0 +1 @@
+#include "ephemeral/Flutter-Generated.xcconfig"
diff --git a/calculator/macos/Flutter/Flutter-Release.xcconfig b/calculator/macos/Flutter/Flutter-Release.xcconfig
new file mode 100644
index 00000000..c2efd0b6
--- /dev/null
+++ b/calculator/macos/Flutter/Flutter-Release.xcconfig
@@ -0,0 +1 @@
+#include "ephemeral/Flutter-Generated.xcconfig"
diff --git a/calculator/macos/Flutter/GeneratedPluginRegistrant.swift b/calculator/macos/Flutter/GeneratedPluginRegistrant.swift
new file mode 100644
index 00000000..cccf817a
--- /dev/null
+++ b/calculator/macos/Flutter/GeneratedPluginRegistrant.swift
@@ -0,0 +1,10 @@
+//
+//  Generated file. Do not edit.
+//
+
+import FlutterMacOS
+import Foundation
+
+
+func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
+}
diff --git a/calculator/macos/Runner.xcodeproj/project.pbxproj b/calculator/macos/Runner.xcodeproj/project.pbxproj
new file mode 100644
index 00000000..3f8f3b4e
--- /dev/null
+++ b/calculator/macos/Runner.xcodeproj/project.pbxproj
@@ -0,0 +1,695 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 54;
+	objects = {
+
+/* Begin PBXAggregateTarget section */
+		33CC111A2044C6BA0003C045 /* Flutter Assemble */ = {
+			isa = PBXAggregateTarget;
+			buildConfigurationList = 33CC111B2044C6BA0003C045 /* Build configuration list for PBXAggregateTarget "Flutter Assemble" */;
+			buildPhases = (
+				33CC111E2044C6BF0003C045 /* ShellScript */,
+			);
+			dependencies = (
+			);
+			name = "Flutter Assemble";
+			productName = FLX;
+		};
+/* End PBXAggregateTarget section */
+
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+		33CC11132044BFA00003C045 /* MainFlutterWindow.swift in Sources */ = {isa = PBXBuildFile; fileRef = 33CC11122044BFA00003C045 /* MainFlutterWindow.swift */; };
+/* End PBXBuildFile section */
+
+/* Begin PBXContainerItemProxy section */
+		331C80D9294CF71000263BE5 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 33CC10E52044A3C60003C045 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 33CC10EC2044A3C60003C045;
+			remoteInfo = Runner;
+		};
+		33CC111F2044C79F0003C045 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 33CC10E52044A3C60003C045 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 33CC111A2044C6BA0003C045;
+			remoteInfo = FLX;
+		};
+/* End PBXContainerItemProxy section */
+
+/* Begin PBXCopyFilesBuildPhase section */
+		33CC110E2044A8840003C045 /* Bundle Framework */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = "";
+			dstSubfolderSpec = 10;
+			files = (
+			);
+			name = "Bundle Framework";
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXCopyFilesBuildPhase section */
+
+/* Begin PBXFileReference section */
+		331C80D5294CF71000263BE5 /* RunnerTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = RunnerTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
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+/* Begin PBXFrameworksBuildPhase section */
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+			);
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+		};
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+			isa = PBXGroup;
+			children = (
+				33FAB671232836740065AC1E /* Runner */,
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+			);
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+		};
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+			);
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+		};
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+			);
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+			path = ..;
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+		};
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+		};
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+
+/* Begin PBXProject section */
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+}
diff --git a/calculator/macos/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/calculator/macos/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 00000000..18d98100
--- /dev/null
+++ b/calculator/macos/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+
+
+
+
+	IDEDidComputeMac32BitWarning
+	
+
+
diff --git a/calculator/macos/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme b/calculator/macos/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
new file mode 100644
index 00000000..54974db0
--- /dev/null
+++ b/calculator/macos/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
@@ -0,0 +1,98 @@
+
+
+   
+      
+         
+            
+            
+         
+      
+   
+   
+      
+         
+         
+      
+      
+         
+            
+            
+         
+      
+   
+   
+      
+         
+         
+      
+   
+   
+      
+         
+         
+      
+   
+   
+   
+   
+   
+
diff --git a/calculator/macos/Runner.xcworkspace/contents.xcworkspacedata b/calculator/macos/Runner.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 00000000..1d526a16
--- /dev/null
+++ b/calculator/macos/Runner.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+
+
+   
+   
+
diff --git a/calculator/macos/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/calculator/macos/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 00000000..18d98100
--- /dev/null
+++ b/calculator/macos/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+
+
+
+
+	IDEDidComputeMac32BitWarning
+	
+
+
diff --git a/calculator/macos/Runner/AppDelegate.swift b/calculator/macos/Runner/AppDelegate.swift
new file mode 100644
index 00000000..d53ef643
--- /dev/null
+++ b/calculator/macos/Runner/AppDelegate.swift
@@ -0,0 +1,9 @@
+import Cocoa
+import FlutterMacOS
+
+@NSApplicationMain
+class AppDelegate: FlutterAppDelegate {
+  override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
+    return true
+  }
+}
diff --git a/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json
new file mode 100644
index 00000000..a2ec33f1
--- /dev/null
+++ b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json
@@ -0,0 +1,68 @@
+{
+  "images" : [
+    {
+      "size" : "16x16",
+      "idiom" : "mac",
+      "filename" : "app_icon_16.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "16x16",
+      "idiom" : "mac",
+      "filename" : "app_icon_32.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "32x32",
+      "idiom" : "mac",
+      "filename" : "app_icon_32.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "32x32",
+      "idiom" : "mac",
+      "filename" : "app_icon_64.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "128x128",
+      "idiom" : "mac",
+      "filename" : "app_icon_128.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "128x128",
+      "idiom" : "mac",
+      "filename" : "app_icon_256.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "256x256",
+      "idiom" : "mac",
+      "filename" : "app_icon_256.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "256x256",
+      "idiom" : "mac",
+      "filename" : "app_icon_512.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "512x512",
+      "idiom" : "mac",
+      "filename" : "app_icon_512.png",
+      "scale" : "1x"
+    },
+    {
+      "size" : "512x512",
+      "idiom" : "mac",
+      "filename" : "app_icon_1024.png",
+      "scale" : "2x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}
diff --git a/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_1024.png b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_1024.png
new file mode 100644
index 00000000..82b6f9d9
Binary files /dev/null and b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_1024.png differ
diff --git a/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_128.png b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_128.png
new file mode 100644
index 00000000..13b35eba
Binary files /dev/null and b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_128.png differ
diff --git a/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_16.png b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_16.png
new file mode 100644
index 00000000..0a3f5fa4
Binary files /dev/null and b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_16.png differ
diff --git a/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_256.png b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_256.png
new file mode 100644
index 00000000..bdb57226
Binary files /dev/null and b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_256.png differ
diff --git a/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_32.png b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_32.png
new file mode 100644
index 00000000..f083318e
Binary files /dev/null and b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_32.png differ
diff --git a/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_512.png b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_512.png
new file mode 100644
index 00000000..326c0e72
Binary files /dev/null and b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_512.png differ
diff --git a/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_64.png b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_64.png
new file mode 100644
index 00000000..2f1632cf
Binary files /dev/null and b/calculator/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_64.png differ
diff --git a/calculator/macos/Runner/Base.lproj/MainMenu.xib b/calculator/macos/Runner/Base.lproj/MainMenu.xib
new file mode 100644
index 00000000..80e867a4
--- /dev/null
+++ b/calculator/macos/Runner/Base.lproj/MainMenu.xib
@@ -0,0 +1,343 @@
+
+
+    
+        
+        
+        
+    
+    
+        
+            
+                
+            
+        
+        
+        
+        
+            
+                
+                
+            
+        
+        
+        
+        
+            
+            
+            
+            
+                
+                
+            
+        
+    
+
diff --git a/calculator/macos/Runner/Configs/AppInfo.xcconfig b/calculator/macos/Runner/Configs/AppInfo.xcconfig
new file mode 100644
index 00000000..4d91ac56
--- /dev/null
+++ b/calculator/macos/Runner/Configs/AppInfo.xcconfig
@@ -0,0 +1,14 @@
+// Application-level settings for the Runner target.
+//
+// This may be replaced with something auto-generated from metadata (e.g., pubspec.yaml) in the
+// future. If not, the values below would default to using the project name when this becomes a
+// 'flutter create' template.
+
+// The application's name. By default this is also the title of the Flutter window.
+PRODUCT_NAME = calculator
+
+// The application's bundle identifier
+PRODUCT_BUNDLE_IDENTIFIER = com.example.calculator
+
+// The copyright displayed in application information
+PRODUCT_COPYRIGHT = Copyright © 2023 com.example. All rights reserved.
diff --git a/calculator/macos/Runner/Configs/Debug.xcconfig b/calculator/macos/Runner/Configs/Debug.xcconfig
new file mode 100644
index 00000000..36b0fd94
--- /dev/null
+++ b/calculator/macos/Runner/Configs/Debug.xcconfig
@@ -0,0 +1,2 @@
+#include "../../Flutter/Flutter-Debug.xcconfig"
+#include "Warnings.xcconfig"
diff --git a/calculator/macos/Runner/Configs/Release.xcconfig b/calculator/macos/Runner/Configs/Release.xcconfig
new file mode 100644
index 00000000..dff4f495
--- /dev/null
+++ b/calculator/macos/Runner/Configs/Release.xcconfig
@@ -0,0 +1,2 @@
+#include "../../Flutter/Flutter-Release.xcconfig"
+#include "Warnings.xcconfig"
diff --git a/calculator/macos/Runner/Configs/Warnings.xcconfig b/calculator/macos/Runner/Configs/Warnings.xcconfig
new file mode 100644
index 00000000..42bcbf47
--- /dev/null
+++ b/calculator/macos/Runner/Configs/Warnings.xcconfig
@@ -0,0 +1,13 @@
+WARNING_CFLAGS = -Wall -Wconditional-uninitialized -Wnullable-to-nonnull-conversion -Wmissing-method-return-type -Woverlength-strings
+GCC_WARN_UNDECLARED_SELECTOR = YES
+CLANG_UNDEFINED_BEHAVIOR_SANITIZER_NULLABILITY = YES
+CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE
+CLANG_WARN__DUPLICATE_METHOD_MATCH = YES
+CLANG_WARN_PRAGMA_PACK = YES
+CLANG_WARN_STRICT_PROTOTYPES = YES
+CLANG_WARN_COMMA = YES
+GCC_WARN_STRICT_SELECTOR_MATCH = YES
+CLANG_WARN_OBJC_REPEATED_USE_OF_WEAK = YES
+CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES
+GCC_WARN_SHADOW = YES
+CLANG_WARN_UNREACHABLE_CODE = YES
diff --git a/calculator/macos/Runner/DebugProfile.entitlements b/calculator/macos/Runner/DebugProfile.entitlements
new file mode 100644
index 00000000..dddb8a30
--- /dev/null
+++ b/calculator/macos/Runner/DebugProfile.entitlements
@@ -0,0 +1,12 @@
+
+
+
+
+	com.apple.security.app-sandbox
+	
+	com.apple.security.cs.allow-jit
+	
+	com.apple.security.network.server
+	
+
+
diff --git a/calculator/macos/Runner/Info.plist b/calculator/macos/Runner/Info.plist
new file mode 100644
index 00000000..4789daa6
--- /dev/null
+++ b/calculator/macos/Runner/Info.plist
@@ -0,0 +1,32 @@
+
+
+
+
+	CFBundleDevelopmentRegion
+	$(DEVELOPMENT_LANGUAGE)
+	CFBundleExecutable
+	$(EXECUTABLE_NAME)
+	CFBundleIconFile
+	
+	CFBundleIdentifier
+	$(PRODUCT_BUNDLE_IDENTIFIER)
+	CFBundleInfoDictionaryVersion
+	6.0
+	CFBundleName
+	$(PRODUCT_NAME)
+	CFBundlePackageType
+	APPL
+	CFBundleShortVersionString
+	$(FLUTTER_BUILD_NAME)
+	CFBundleVersion
+	$(FLUTTER_BUILD_NUMBER)
+	LSMinimumSystemVersion
+	$(MACOSX_DEPLOYMENT_TARGET)
+	NSHumanReadableCopyright
+	$(PRODUCT_COPYRIGHT)
+	NSMainNibFile
+	MainMenu
+	NSPrincipalClass
+	NSApplication
+
+
diff --git a/calculator/macos/Runner/MainFlutterWindow.swift b/calculator/macos/Runner/MainFlutterWindow.swift
new file mode 100644
index 00000000..3cc05eb2
--- /dev/null
+++ b/calculator/macos/Runner/MainFlutterWindow.swift
@@ -0,0 +1,15 @@
+import Cocoa
+import FlutterMacOS
+
+class MainFlutterWindow: NSWindow {
+  override func awakeFromNib() {
+    let flutterViewController = FlutterViewController()
+    let windowFrame = self.frame
+    self.contentViewController = flutterViewController
+    self.setFrame(windowFrame, display: true)
+
+    RegisterGeneratedPlugins(registry: flutterViewController)
+
+    super.awakeFromNib()
+  }
+}
diff --git a/calculator/macos/Runner/Release.entitlements b/calculator/macos/Runner/Release.entitlements
new file mode 100644
index 00000000..852fa1a4
--- /dev/null
+++ b/calculator/macos/Runner/Release.entitlements
@@ -0,0 +1,8 @@
+
+
+
+
+	com.apple.security.app-sandbox
+	
+
+
diff --git a/calculator/macos/RunnerTests/RunnerTests.swift b/calculator/macos/RunnerTests/RunnerTests.swift
new file mode 100644
index 00000000..5418c9f5
--- /dev/null
+++ b/calculator/macos/RunnerTests/RunnerTests.swift
@@ -0,0 +1,12 @@
+import FlutterMacOS
+import Cocoa
+import XCTest
+
+class RunnerTests: XCTestCase {
+
+  func testExample() {
+    // If you add code to the Runner application, consider adding tests here.
+    // See https://developer.apple.com/documentation/xctest for more information about using XCTest.
+  }
+
+}
diff --git a/calculator/pubspec.yaml b/calculator/pubspec.yaml
new file mode 100644
index 00000000..5f7b56af
--- /dev/null
+++ b/calculator/pubspec.yaml
@@ -0,0 +1,91 @@
+name: calculator
+description: A new Flutter project.
+# The following line prevents the package from being accidentally published to
+# pub.dev using `flutter pub publish`. This is preferred for private packages.
+publish_to: 'none' # Remove this line if you wish to publish to pub.dev
+
+# The following defines the version and build number for your application.
+# A version number is three numbers separated by dots, like 1.2.43
+# followed by an optional build number separated by a +.
+# Both the version and the builder number may be overridden in flutter
+# build by specifying --build-name and --build-number, respectively.
+# In Android, build-name is used as versionName while build-number used as versionCode.
+# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
+# In iOS, build-name is used as CFBundleShortVersionString while build-number is used as CFBundleVersion.
+# Read more about iOS versioning at
+# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
+# In Windows, build-name is used as the major, minor, and patch parts
+# of the product and file versions while build-number is used as the build suffix.
+version: 1.0.0+1
+
+environment:
+  sdk: '>=3.1.4 <4.0.0'
+
+# Dependencies specify other packages that your package needs in order to work.
+# To automatically upgrade your package dependencies to the latest versions
+# consider running `flutter pub upgrade --major-versions`. Alternatively,
+# dependencies can be manually updated by changing the version numbers below to
+# the latest version available on pub.dev. To see which dependencies have newer
+# versions available, run `flutter pub outdated`.
+dependencies:
+  flutter:
+    sdk: flutter
+
+
+  # The following adds the Cupertino Icons font to your application.
+  # Use with the CupertinoIcons class for iOS style icons.
+  cupertino_icons: ^1.0.2
+  math_expressions: ^2.4.0
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+  # The "flutter_lints" package below contains a set of recommended lints to
+  # encourage good coding practices. The lint set provided by the package is
+  # activated in the `analysis_options.yaml` file located at the root of your
+  # package. See that file for information about deactivating specific lint
+  # rules and activating additional ones.
+  flutter_lints: ^2.0.0
+
+# For information on the generic Dart part of this file, see the
+# following page: https://dart.dev/tools/pub/pubspec
+
+# The following section is specific to Flutter packages.
+flutter:
+
+  # The following line ensures that the Material Icons font is
+  # included with your application, so that you can use the icons in
+  # the material Icons class.
+  uses-material-design: true
+
+  # To add assets to your application, add an assets section, like this:
+  # assets:
+  #   - images/a_dot_burr.jpeg
+  #   - images/a_dot_ham.jpeg
+
+  # An image asset can refer to one or more resolution-specific "variants", see
+  # https://flutter.dev/assets-and-images/#resolution-aware
+
+  # For details regarding adding assets from package dependencies, see
+  # https://flutter.dev/assets-and-images/#from-packages
+
+  # To add custom fonts to your application, add a fonts section here,
+  # in this "flutter" section. Each entry in this list should have a
+  # "family" key with the font family name, and a "fonts" key with a
+  # list giving the asset and other descriptors for the font. For
+  # example:
+  # fonts:
+  #   - family: Schyler
+  #     fonts:
+  #       - asset: fonts/Schyler-Regular.ttf
+  #       - asset: fonts/Schyler-Italic.ttf
+  #         style: italic
+  #   - family: Trajan Pro
+  #     fonts:
+  #       - asset: fonts/TrajanPro.ttf
+  #       - asset: fonts/TrajanPro_Bold.ttf
+  #         weight: 700
+  #
+  # For details regarding fonts from package dependencies,
+  # see https://flutter.dev/custom-fonts/#from-packages
diff --git a/calculator/test/widget_test.dart b/calculator/test/widget_test.dart
new file mode 100644
index 00000000..4675e590
--- /dev/null
+++ b/calculator/test/widget_test.dart
@@ -0,0 +1,30 @@
+// This is a basic Flutter widget test.
+//
+// To perform an interaction with a widget in your test, use the WidgetTester
+// utility in the flutter_test package. For example, you can send tap and scroll
+// gestures. You can also use WidgetTester to find child widgets in the widget
+// tree, read text, and verify that the values of widget properties are correct.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:calculator/main.dart';
+
+void main() {
+  testWidgets('Counter increments smoke test', (WidgetTester tester) async {
+    // Build our app and trigger a frame.
+    await tester.pumpWidget(const MyApp());
+
+    // Verify that our counter starts at 0.
+    expect(find.text('0'), findsOneWidget);
+    expect(find.text('1'), findsNothing);
+
+    // Tap the '+' icon and trigger a frame.
+    await tester.tap(find.byIcon(Icons.add));
+    await tester.pump();
+
+    // Verify that our counter has incremented.
+    expect(find.text('0'), findsNothing);
+    expect(find.text('1'), findsOneWidget);
+  });
+}
diff --git a/calculator/web/favicon.png b/calculator/web/favicon.png
new file mode 100644
index 00000000..8aaa46ac
Binary files /dev/null and b/calculator/web/favicon.png differ
diff --git a/calculator/web/icons/Icon-192.png b/calculator/web/icons/Icon-192.png
new file mode 100644
index 00000000..b749bfef
Binary files /dev/null and b/calculator/web/icons/Icon-192.png differ
diff --git a/calculator/web/icons/Icon-512.png b/calculator/web/icons/Icon-512.png
new file mode 100644
index 00000000..88cfd48d
Binary files /dev/null and b/calculator/web/icons/Icon-512.png differ
diff --git a/calculator/web/icons/Icon-maskable-192.png b/calculator/web/icons/Icon-maskable-192.png
new file mode 100644
index 00000000..eb9b4d76
Binary files /dev/null and b/calculator/web/icons/Icon-maskable-192.png differ
diff --git a/calculator/web/icons/Icon-maskable-512.png b/calculator/web/icons/Icon-maskable-512.png
new file mode 100644
index 00000000..d69c5669
Binary files /dev/null and b/calculator/web/icons/Icon-maskable-512.png differ
diff --git a/calculator/web/index.html b/calculator/web/index.html
new file mode 100644
index 00000000..491553a6
--- /dev/null
+++ b/calculator/web/index.html
@@ -0,0 +1,59 @@
+
+
+
+  
+  
+
+  
+  
+  
+
+  
+  
+  
+  
+  
+
+  
+  
+
+  calculator
+  
+
+  
+  
+  
+
+
+  
+
+
diff --git a/calculator/web/manifest.json b/calculator/web/manifest.json
new file mode 100644
index 00000000..d1d7e7d3
--- /dev/null
+++ b/calculator/web/manifest.json
@@ -0,0 +1,35 @@
+{
+    "name": "calculator",
+    "short_name": "calculator",
+    "start_url": ".",
+    "display": "standalone",
+    "background_color": "#0175C2",
+    "theme_color": "#0175C2",
+    "description": "A new Flutter project.",
+    "orientation": "portrait-primary",
+    "prefer_related_applications": false,
+    "icons": [
+        {
+            "src": "icons/Icon-192.png",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "icons/Icon-512.png",
+            "sizes": "512x512",
+            "type": "image/png"
+        },
+        {
+            "src": "icons/Icon-maskable-192.png",
+            "sizes": "192x192",
+            "type": "image/png",
+            "purpose": "maskable"
+        },
+        {
+            "src": "icons/Icon-maskable-512.png",
+            "sizes": "512x512",
+            "type": "image/png",
+            "purpose": "maskable"
+        }
+    ]
+}
diff --git a/calculator/windows/.gitignore b/calculator/windows/.gitignore
new file mode 100644
index 00000000..d492d0d9
--- /dev/null
+++ b/calculator/windows/.gitignore
@@ -0,0 +1,17 @@
+flutter/ephemeral/
+
+# Visual Studio user-specific files.
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# Visual Studio build-related files.
+x64/
+x86/
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!*.[Cc]ache/
diff --git a/calculator/windows/CMakeLists.txt b/calculator/windows/CMakeLists.txt
new file mode 100644
index 00000000..097f65e6
--- /dev/null
+++ b/calculator/windows/CMakeLists.txt
@@ -0,0 +1,102 @@
+# Project-level configuration.
+cmake_minimum_required(VERSION 3.14)
+project(calculator LANGUAGES CXX)
+
+# The name of the executable created for the application. Change this to change
+# the on-disk name of your application.
+set(BINARY_NAME "calculator")
+
+# Explicitly opt in to modern CMake behaviors to avoid warnings with recent
+# versions of CMake.
+cmake_policy(VERSION 3.14...3.25)
+
+# Define build configuration option.
+get_property(IS_MULTICONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(IS_MULTICONFIG)
+  set(CMAKE_CONFIGURATION_TYPES "Debug;Profile;Release"
+    CACHE STRING "" FORCE)
+else()
+  if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+    set(CMAKE_BUILD_TYPE "Debug" CACHE
+      STRING "Flutter build mode" FORCE)
+    set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+      "Debug" "Profile" "Release")
+  endif()
+endif()
+# Define settings for the Profile build mode.
+set(CMAKE_EXE_LINKER_FLAGS_PROFILE "${CMAKE_EXE_LINKER_FLAGS_RELEASE}")
+set(CMAKE_SHARED_LINKER_FLAGS_PROFILE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE}")
+set(CMAKE_C_FLAGS_PROFILE "${CMAKE_C_FLAGS_RELEASE}")
+set(CMAKE_CXX_FLAGS_PROFILE "${CMAKE_CXX_FLAGS_RELEASE}")
+
+# Use Unicode for all projects.
+add_definitions(-DUNICODE -D_UNICODE)
+
+# Compilation settings that should be applied to most targets.
+#
+# Be cautious about adding new options here, as plugins use this function by
+# default. In most cases, you should add new options to specific targets instead
+# of modifying this function.
+function(APPLY_STANDARD_SETTINGS TARGET)
+  target_compile_features(${TARGET} PUBLIC cxx_std_17)
+  target_compile_options(${TARGET} PRIVATE /W4 /WX /wd"4100")
+  target_compile_options(${TARGET} PRIVATE /EHsc)
+  target_compile_definitions(${TARGET} PRIVATE "_HAS_EXCEPTIONS=0")
+  target_compile_definitions(${TARGET} PRIVATE "$<$:_DEBUG>")
+endfunction()
+
+# Flutter library and tool build rules.
+set(FLUTTER_MANAGED_DIR "${CMAKE_CURRENT_SOURCE_DIR}/flutter")
+add_subdirectory(${FLUTTER_MANAGED_DIR})
+
+# Application build; see runner/CMakeLists.txt.
+add_subdirectory("runner")
+
+
+# Generated plugin build rules, which manage building the plugins and adding
+# them to the application.
+include(flutter/generated_plugins.cmake)
+
+
+# === Installation ===
+# Support files are copied into place next to the executable, so that it can
+# run in place. This is done instead of making a separate bundle (as on Linux)
+# so that building and running from within Visual Studio will work.
+set(BUILD_BUNDLE_DIR "$")
+# Make the "install" step default, as it's required to run.
+set(CMAKE_VS_INCLUDE_INSTALL_TO_DEFAULT_BUILD 1)
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+  set(CMAKE_INSTALL_PREFIX "${BUILD_BUNDLE_DIR}" CACHE PATH "..." FORCE)
+endif()
+
+set(INSTALL_BUNDLE_DATA_DIR "${CMAKE_INSTALL_PREFIX}/data")
+set(INSTALL_BUNDLE_LIB_DIR "${CMAKE_INSTALL_PREFIX}")
+
+install(TARGETS ${BINARY_NAME} RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_ICU_DATA_FILE}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+  COMPONENT Runtime)
+
+if(PLUGIN_BUNDLED_LIBRARIES)
+  install(FILES "${PLUGIN_BUNDLED_LIBRARIES}"
+    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endif()
+
+# Fully re-copy the assets directory on each build to avoid having stale files
+# from a previous install.
+set(FLUTTER_ASSET_DIR_NAME "flutter_assets")
+install(CODE "
+  file(REMOVE_RECURSE \"${INSTALL_BUNDLE_DATA_DIR}/${FLUTTER_ASSET_DIR_NAME}\")
+  " COMPONENT Runtime)
+install(DIRECTORY "${PROJECT_BUILD_DIR}/${FLUTTER_ASSET_DIR_NAME}"
+  DESTINATION "${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)
+
+# Install the AOT library on non-Debug builds only.
+install(FILES "${AOT_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
+  CONFIGURATIONS Profile;Release
+  COMPONENT Runtime)
diff --git a/calculator/windows/flutter/CMakeLists.txt b/calculator/windows/flutter/CMakeLists.txt
new file mode 100644
index 00000000..930d2071
--- /dev/null
+++ b/calculator/windows/flutter/CMakeLists.txt
@@ -0,0 +1,104 @@
+# This file controls Flutter-level build steps. It should not be edited.
+cmake_minimum_required(VERSION 3.14)
+
+set(EPHEMERAL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/ephemeral")
+
+# Configuration provided via flutter tool.
+include(${EPHEMERAL_DIR}/generated_config.cmake)
+
+# TODO: Move the rest of this into files in ephemeral. See
+# https://github.com/flutter/flutter/issues/57146.
+set(WRAPPER_ROOT "${EPHEMERAL_DIR}/cpp_client_wrapper")
+
+# === Flutter Library ===
+set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/flutter_windows.dll")
+
+# Published to parent scope for install step.
+set(FLUTTER_LIBRARY ${FLUTTER_LIBRARY} PARENT_SCOPE)
+set(FLUTTER_ICU_DATA_FILE "${EPHEMERAL_DIR}/icudtl.dat" PARENT_SCOPE)
+set(PROJECT_BUILD_DIR "${PROJECT_DIR}/build/" PARENT_SCOPE)
+set(AOT_LIBRARY "${PROJECT_DIR}/build/windows/app.so" PARENT_SCOPE)
+
+list(APPEND FLUTTER_LIBRARY_HEADERS
+  "flutter_export.h"
+  "flutter_windows.h"
+  "flutter_messenger.h"
+  "flutter_plugin_registrar.h"
+  "flutter_texture_registrar.h"
+)
+list(TRANSFORM FLUTTER_LIBRARY_HEADERS PREPEND "${EPHEMERAL_DIR}/")
+add_library(flutter INTERFACE)
+target_include_directories(flutter INTERFACE
+  "${EPHEMERAL_DIR}"
+)
+target_link_libraries(flutter INTERFACE "${FLUTTER_LIBRARY}.lib")
+add_dependencies(flutter flutter_assemble)
+
+# === Wrapper ===
+list(APPEND CPP_WRAPPER_SOURCES_CORE
+  "core_implementations.cc"
+  "standard_codec.cc"
+)
+list(TRANSFORM CPP_WRAPPER_SOURCES_CORE PREPEND "${WRAPPER_ROOT}/")
+list(APPEND CPP_WRAPPER_SOURCES_PLUGIN
+  "plugin_registrar.cc"
+)
+list(TRANSFORM CPP_WRAPPER_SOURCES_PLUGIN PREPEND "${WRAPPER_ROOT}/")
+list(APPEND CPP_WRAPPER_SOURCES_APP
+  "flutter_engine.cc"
+  "flutter_view_controller.cc"
+)
+list(TRANSFORM CPP_WRAPPER_SOURCES_APP PREPEND "${WRAPPER_ROOT}/")
+
+# Wrapper sources needed for a plugin.
+add_library(flutter_wrapper_plugin STATIC
+  ${CPP_WRAPPER_SOURCES_CORE}
+  ${CPP_WRAPPER_SOURCES_PLUGIN}
+)
+apply_standard_settings(flutter_wrapper_plugin)
+set_target_properties(flutter_wrapper_plugin PROPERTIES
+  POSITION_INDEPENDENT_CODE ON)
+set_target_properties(flutter_wrapper_plugin PROPERTIES
+  CXX_VISIBILITY_PRESET hidden)
+target_link_libraries(flutter_wrapper_plugin PUBLIC flutter)
+target_include_directories(flutter_wrapper_plugin PUBLIC
+  "${WRAPPER_ROOT}/include"
+)
+add_dependencies(flutter_wrapper_plugin flutter_assemble)
+
+# Wrapper sources needed for the runner.
+add_library(flutter_wrapper_app STATIC
+  ${CPP_WRAPPER_SOURCES_CORE}
+  ${CPP_WRAPPER_SOURCES_APP}
+)
+apply_standard_settings(flutter_wrapper_app)
+target_link_libraries(flutter_wrapper_app PUBLIC flutter)
+target_include_directories(flutter_wrapper_app PUBLIC
+  "${WRAPPER_ROOT}/include"
+)
+add_dependencies(flutter_wrapper_app flutter_assemble)
+
+# === Flutter tool backend ===
+# _phony_ is a non-existent file to force this command to run every time,
+# since currently there's no way to get a full input/output list from the
+# flutter tool.
+set(PHONY_OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/_phony_")
+set_source_files_properties("${PHONY_OUTPUT}" PROPERTIES SYMBOLIC TRUE)
+add_custom_command(
+  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
+    ${CPP_WRAPPER_SOURCES_CORE} ${CPP_WRAPPER_SOURCES_PLUGIN}
+    ${CPP_WRAPPER_SOURCES_APP}
+    ${PHONY_OUTPUT}
+  COMMAND ${CMAKE_COMMAND} -E env
+    ${FLUTTER_TOOL_ENVIRONMENT}
+    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.bat"
+      windows-x64 $
+  VERBATIM
+)
+add_custom_target(flutter_assemble DEPENDS
+  "${FLUTTER_LIBRARY}"
+  ${FLUTTER_LIBRARY_HEADERS}
+  ${CPP_WRAPPER_SOURCES_CORE}
+  ${CPP_WRAPPER_SOURCES_PLUGIN}
+  ${CPP_WRAPPER_SOURCES_APP}
+)
diff --git a/calculator/windows/flutter/generated_plugin_registrant.cc b/calculator/windows/flutter/generated_plugin_registrant.cc
new file mode 100644
index 00000000..8b6d4680
--- /dev/null
+++ b/calculator/windows/flutter/generated_plugin_registrant.cc
@@ -0,0 +1,11 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#include "generated_plugin_registrant.h"
+
+
+void RegisterPlugins(flutter::PluginRegistry* registry) {
+}
diff --git a/calculator/windows/flutter/generated_plugin_registrant.h b/calculator/windows/flutter/generated_plugin_registrant.h
new file mode 100644
index 00000000..dc139d85
--- /dev/null
+++ b/calculator/windows/flutter/generated_plugin_registrant.h
@@ -0,0 +1,15 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#ifndef GENERATED_PLUGIN_REGISTRANT_
+#define GENERATED_PLUGIN_REGISTRANT_
+
+#include 
+
+// Registers Flutter plugins.
+void RegisterPlugins(flutter::PluginRegistry* registry);
+
+#endif  // GENERATED_PLUGIN_REGISTRANT_
diff --git a/calculator/windows/flutter/generated_plugins.cmake b/calculator/windows/flutter/generated_plugins.cmake
new file mode 100644
index 00000000..b93c4c30
--- /dev/null
+++ b/calculator/windows/flutter/generated_plugins.cmake
@@ -0,0 +1,23 @@
+#
+# Generated file, do not edit.
+#
+
+list(APPEND FLUTTER_PLUGIN_LIST
+)
+
+list(APPEND FLUTTER_FFI_PLUGIN_LIST
+)
+
+set(PLUGIN_BUNDLED_LIBRARIES)
+
+foreach(plugin ${FLUTTER_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${plugin}/windows plugins/${plugin})
+  target_link_libraries(${BINARY_NAME} PRIVATE ${plugin}_plugin)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES $)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${plugin}_bundled_libraries})
+endforeach(plugin)
+
+foreach(ffi_plugin ${FLUTTER_FFI_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${ffi_plugin}/windows plugins/${ffi_plugin})
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${ffi_plugin}_bundled_libraries})
+endforeach(ffi_plugin)
diff --git a/calculator/windows/runner/CMakeLists.txt b/calculator/windows/runner/CMakeLists.txt
new file mode 100644
index 00000000..394917c0
--- /dev/null
+++ b/calculator/windows/runner/CMakeLists.txt
@@ -0,0 +1,40 @@
+cmake_minimum_required(VERSION 3.14)
+project(runner LANGUAGES CXX)
+
+# Define the application target. To change its name, change BINARY_NAME in the
+# top-level CMakeLists.txt, not the value here, or `flutter run` will no longer
+# work.
+#
+# Any new source files that you add to the application should be added here.
+add_executable(${BINARY_NAME} WIN32
+  "flutter_window.cpp"
+  "main.cpp"
+  "utils.cpp"
+  "win32_window.cpp"
+  "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc"
+  "Runner.rc"
+  "runner.exe.manifest"
+)
+
+# Apply the standard set of build settings. This can be removed for applications
+# that need different build settings.
+apply_standard_settings(${BINARY_NAME})
+
+# Add preprocessor definitions for the build version.
+target_compile_definitions(${BINARY_NAME} PRIVATE "FLUTTER_VERSION=\"${FLUTTER_VERSION}\"")
+target_compile_definitions(${BINARY_NAME} PRIVATE "FLUTTER_VERSION_MAJOR=${FLUTTER_VERSION_MAJOR}")
+target_compile_definitions(${BINARY_NAME} PRIVATE "FLUTTER_VERSION_MINOR=${FLUTTER_VERSION_MINOR}")
+target_compile_definitions(${BINARY_NAME} PRIVATE "FLUTTER_VERSION_PATCH=${FLUTTER_VERSION_PATCH}")
+target_compile_definitions(${BINARY_NAME} PRIVATE "FLUTTER_VERSION_BUILD=${FLUTTER_VERSION_BUILD}")
+
+# Disable Windows macros that collide with C++ standard library functions.
+target_compile_definitions(${BINARY_NAME} PRIVATE "NOMINMAX")
+
+# Add dependency libraries and include directories. Add any application-specific
+# dependencies here.
+target_link_libraries(${BINARY_NAME} PRIVATE flutter flutter_wrapper_app)
+target_link_libraries(${BINARY_NAME} PRIVATE "dwmapi.lib")
+target_include_directories(${BINARY_NAME} PRIVATE "${CMAKE_SOURCE_DIR}")
+
+# Run the Flutter tool portions of the build. This must not be removed.
+add_dependencies(${BINARY_NAME} flutter_assemble)
diff --git a/calculator/windows/runner/Runner.rc b/calculator/windows/runner/Runner.rc
new file mode 100644
index 00000000..eb15b677
--- /dev/null
+++ b/calculator/windows/runner/Runner.rc
@@ -0,0 +1,121 @@
+// Microsoft Visual C++ generated resource script.
+//
+#pragma code_page(65001)
+#include "resource.h"
+
+#define APSTUDIO_READONLY_SYMBOLS
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 2 resource.
+//
+#include "winres.h"
+
+/////////////////////////////////////////////////////////////////////////////
+#undef APSTUDIO_READONLY_SYMBOLS
+
+/////////////////////////////////////////////////////////////////////////////
+// English (United States) resources
+
+#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
+LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
+
+#ifdef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// TEXTINCLUDE
+//
+
+1 TEXTINCLUDE
+BEGIN
+    "resource.h\0"
+END
+
+2 TEXTINCLUDE
+BEGIN
+    "#include ""winres.h""\r\n"
+    "\0"
+END
+
+3 TEXTINCLUDE
+BEGIN
+    "\r\n"
+    "\0"
+END
+
+#endif    // APSTUDIO_INVOKED
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Icon
+//
+
+// Icon with lowest ID value placed first to ensure application icon
+// remains consistent on all systems.
+IDI_APP_ICON            ICON                    "resources\\app_icon.ico"
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Version
+//
+
+#if defined(FLUTTER_VERSION_MAJOR) && defined(FLUTTER_VERSION_MINOR) && defined(FLUTTER_VERSION_PATCH) && defined(FLUTTER_VERSION_BUILD)
+#define VERSION_AS_NUMBER FLUTTER_VERSION_MAJOR,FLUTTER_VERSION_MINOR,FLUTTER_VERSION_PATCH,FLUTTER_VERSION_BUILD
+#else
+#define VERSION_AS_NUMBER 1,0,0,0
+#endif
+
+#if defined(FLUTTER_VERSION)
+#define VERSION_AS_STRING FLUTTER_VERSION
+#else
+#define VERSION_AS_STRING "1.0.0"
+#endif
+
+VS_VERSION_INFO VERSIONINFO
+ FILEVERSION VERSION_AS_NUMBER
+ PRODUCTVERSION VERSION_AS_NUMBER
+ FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
+#ifdef _DEBUG
+ FILEFLAGS VS_FF_DEBUG
+#else
+ FILEFLAGS 0x0L
+#endif
+ FILEOS VOS__WINDOWS32
+ FILETYPE VFT_APP
+ FILESUBTYPE 0x0L
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904e4"
+        BEGIN
+            VALUE "CompanyName", "com.example" "\0"
+            VALUE "FileDescription", "calculator" "\0"
+            VALUE "FileVersion", VERSION_AS_STRING "\0"
+            VALUE "InternalName", "calculator" "\0"
+            VALUE "LegalCopyright", "Copyright (C) 2023 com.example. All rights reserved." "\0"
+            VALUE "OriginalFilename", "calculator.exe" "\0"
+            VALUE "ProductName", "calculator" "\0"
+            VALUE "ProductVersion", VERSION_AS_STRING "\0"
+        END
+    END
+    BLOCK "VarFileInfo"
+    BEGIN
+        VALUE "Translation", 0x409, 1252
+    END
+END
+
+#endif    // English (United States) resources
+/////////////////////////////////////////////////////////////////////////////
+
+
+
+#ifndef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 3 resource.
+//
+
+
+/////////////////////////////////////////////////////////////////////////////
+#endif    // not APSTUDIO_INVOKED
diff --git a/calculator/windows/runner/flutter_window.cpp b/calculator/windows/runner/flutter_window.cpp
new file mode 100644
index 00000000..955ee303
--- /dev/null
+++ b/calculator/windows/runner/flutter_window.cpp
@@ -0,0 +1,71 @@
+#include "flutter_window.h"
+
+#include 
+
+#include "flutter/generated_plugin_registrant.h"
+
+FlutterWindow::FlutterWindow(const flutter::DartProject& project)
+    : project_(project) {}
+
+FlutterWindow::~FlutterWindow() {}
+
+bool FlutterWindow::OnCreate() {
+  if (!Win32Window::OnCreate()) {
+    return false;
+  }
+
+  RECT frame = GetClientArea();
+
+  // The size here must match the window dimensions to avoid unnecessary surface
+  // creation / destruction in the startup path.
+  flutter_controller_ = std::make_unique(
+      frame.right - frame.left, frame.bottom - frame.top, project_);
+  // Ensure that basic setup of the controller was successful.
+  if (!flutter_controller_->engine() || !flutter_controller_->view()) {
+    return false;
+  }
+  RegisterPlugins(flutter_controller_->engine());
+  SetChildContent(flutter_controller_->view()->GetNativeWindow());
+
+  flutter_controller_->engine()->SetNextFrameCallback([&]() {
+    this->Show();
+  });
+
+  // Flutter can complete the first frame before the "show window" callback is
+  // registered. The following call ensures a frame is pending to ensure the
+  // window is shown. It is a no-op if the first frame hasn't completed yet.
+  flutter_controller_->ForceRedraw();
+
+  return true;
+}
+
+void FlutterWindow::OnDestroy() {
+  if (flutter_controller_) {
+    flutter_controller_ = nullptr;
+  }
+
+  Win32Window::OnDestroy();
+}
+
+LRESULT
+FlutterWindow::MessageHandler(HWND hwnd, UINT const message,
+                              WPARAM const wparam,
+                              LPARAM const lparam) noexcept {
+  // Give Flutter, including plugins, an opportunity to handle window messages.
+  if (flutter_controller_) {
+    std::optional result =
+        flutter_controller_->HandleTopLevelWindowProc(hwnd, message, wparam,
+                                                      lparam);
+    if (result) {
+      return *result;
+    }
+  }
+
+  switch (message) {
+    case WM_FONTCHANGE:
+      flutter_controller_->engine()->ReloadSystemFonts();
+      break;
+  }
+
+  return Win32Window::MessageHandler(hwnd, message, wparam, lparam);
+}
diff --git a/calculator/windows/runner/flutter_window.h b/calculator/windows/runner/flutter_window.h
new file mode 100644
index 00000000..6da0652f
--- /dev/null
+++ b/calculator/windows/runner/flutter_window.h
@@ -0,0 +1,33 @@
+#ifndef RUNNER_FLUTTER_WINDOW_H_
+#define RUNNER_FLUTTER_WINDOW_H_
+
+#include 
+#include 
+
+#include 
+
+#include "win32_window.h"
+
+// A window that does nothing but host a Flutter view.
+class FlutterWindow : public Win32Window {
+ public:
+  // Creates a new FlutterWindow hosting a Flutter view running |project|.
+  explicit FlutterWindow(const flutter::DartProject& project);
+  virtual ~FlutterWindow();
+
+ protected:
+  // Win32Window:
+  bool OnCreate() override;
+  void OnDestroy() override;
+  LRESULT MessageHandler(HWND window, UINT const message, WPARAM const wparam,
+                         LPARAM const lparam) noexcept override;
+
+ private:
+  // The project to run.
+  flutter::DartProject project_;
+
+  // The Flutter instance hosted by this window.
+  std::unique_ptr flutter_controller_;
+};
+
+#endif  // RUNNER_FLUTTER_WINDOW_H_
diff --git a/calculator/windows/runner/main.cpp b/calculator/windows/runner/main.cpp
new file mode 100644
index 00000000..e4d919b9
--- /dev/null
+++ b/calculator/windows/runner/main.cpp
@@ -0,0 +1,43 @@
+#include 
+#include 
+#include 
+
+#include "flutter_window.h"
+#include "utils.h"
+
+int APIENTRY wWinMain(_In_ HINSTANCE instance, _In_opt_ HINSTANCE prev,
+                      _In_ wchar_t *command_line, _In_ int show_command) {
+  // Attach to console when present (e.g., 'flutter run') or create a
+  // new console when running with a debugger.
+  if (!::AttachConsole(ATTACH_PARENT_PROCESS) && ::IsDebuggerPresent()) {
+    CreateAndAttachConsole();
+  }
+
+  // Initialize COM, so that it is available for use in the library and/or
+  // plugins.
+  ::CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED);
+
+  flutter::DartProject project(L"data");
+
+  std::vector command_line_arguments =
+      GetCommandLineArguments();
+
+  project.set_dart_entrypoint_arguments(std::move(command_line_arguments));
+
+  FlutterWindow window(project);
+  Win32Window::Point origin(10, 10);
+  Win32Window::Size size(1280, 720);
+  if (!window.Create(L"calculator", origin, size)) {
+    return EXIT_FAILURE;
+  }
+  window.SetQuitOnClose(true);
+
+  ::MSG msg;
+  while (::GetMessage(&msg, nullptr, 0, 0)) {
+    ::TranslateMessage(&msg);
+    ::DispatchMessage(&msg);
+  }
+
+  ::CoUninitialize();
+  return EXIT_SUCCESS;
+}
diff --git a/calculator/windows/runner/resource.h b/calculator/windows/runner/resource.h
new file mode 100644
index 00000000..66a65d1e
--- /dev/null
+++ b/calculator/windows/runner/resource.h
@@ -0,0 +1,16 @@
+//{{NO_DEPENDENCIES}}
+// Microsoft Visual C++ generated include file.
+// Used by Runner.rc
+//
+#define IDI_APP_ICON                    101
+
+// Next default values for new objects
+//
+#ifdef APSTUDIO_INVOKED
+#ifndef APSTUDIO_READONLY_SYMBOLS
+#define _APS_NEXT_RESOURCE_VALUE        102
+#define _APS_NEXT_COMMAND_VALUE         40001
+#define _APS_NEXT_CONTROL_VALUE         1001
+#define _APS_NEXT_SYMED_VALUE           101
+#endif
+#endif
diff --git a/calculator/windows/runner/resources/app_icon.ico b/calculator/windows/runner/resources/app_icon.ico
new file mode 100644
index 00000000..c04e20ca
Binary files /dev/null and b/calculator/windows/runner/resources/app_icon.ico differ
diff --git a/calculator/windows/runner/runner.exe.manifest b/calculator/windows/runner/runner.exe.manifest
new file mode 100644
index 00000000..a42ea768
--- /dev/null
+++ b/calculator/windows/runner/runner.exe.manifest
@@ -0,0 +1,20 @@
+
+
+  
+    
+      PerMonitorV2
+    
+  
+  
+    
+      
+      
+      
+      
+      
+      
+      
+      
+    
+  
+
diff --git a/calculator/windows/runner/utils.cpp b/calculator/windows/runner/utils.cpp
new file mode 100644
index 00000000..b2b08734
--- /dev/null
+++ b/calculator/windows/runner/utils.cpp
@@ -0,0 +1,65 @@
+#include "utils.h"
+
+#include 
+#include 
+#include 
+#include 
+
+#include 
+
+void CreateAndAttachConsole() {
+  if (::AllocConsole()) {
+    FILE *unused;
+    if (freopen_s(&unused, "CONOUT$", "w", stdout)) {
+      _dup2(_fileno(stdout), 1);
+    }
+    if (freopen_s(&unused, "CONOUT$", "w", stderr)) {
+      _dup2(_fileno(stdout), 2);
+    }
+    std::ios::sync_with_stdio();
+    FlutterDesktopResyncOutputStreams();
+  }
+}
+
+std::vector GetCommandLineArguments() {
+  // Convert the UTF-16 command line arguments to UTF-8 for the Engine to use.
+  int argc;
+  wchar_t** argv = ::CommandLineToArgvW(::GetCommandLineW(), &argc);
+  if (argv == nullptr) {
+    return std::vector();
+  }
+
+  std::vector command_line_arguments;
+
+  // Skip the first argument as it's the binary name.
+  for (int i = 1; i < argc; i++) {
+    command_line_arguments.push_back(Utf8FromUtf16(argv[i]));
+  }
+
+  ::LocalFree(argv);
+
+  return command_line_arguments;
+}
+
+std::string Utf8FromUtf16(const wchar_t* utf16_string) {
+  if (utf16_string == nullptr) {
+    return std::string();
+  }
+  int target_length = ::WideCharToMultiByte(
+      CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string,
+      -1, nullptr, 0, nullptr, nullptr)
+    -1; // remove the trailing null character
+  int input_length = (int)wcslen(utf16_string);
+  std::string utf8_string;
+  if (target_length <= 0 || target_length > utf8_string.max_size()) {
+    return utf8_string;
+  }
+  utf8_string.resize(target_length);
+  int converted_length = ::WideCharToMultiByte(
+      CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string,
+      input_length, utf8_string.data(), target_length, nullptr, nullptr);
+  if (converted_length == 0) {
+    return std::string();
+  }
+  return utf8_string;
+}
diff --git a/calculator/windows/runner/utils.h b/calculator/windows/runner/utils.h
new file mode 100644
index 00000000..3879d547
--- /dev/null
+++ b/calculator/windows/runner/utils.h
@@ -0,0 +1,19 @@
+#ifndef RUNNER_UTILS_H_
+#define RUNNER_UTILS_H_
+
+#include 
+#include 
+
+// Creates a console for the process, and redirects stdout and stderr to
+// it for both the runner and the Flutter library.
+void CreateAndAttachConsole();
+
+// Takes a null-terminated wchar_t* encoded in UTF-16 and returns a std::string
+// encoded in UTF-8. Returns an empty std::string on failure.
+std::string Utf8FromUtf16(const wchar_t* utf16_string);
+
+// Gets the command line arguments passed in as a std::vector,
+// encoded in UTF-8. Returns an empty std::vector on failure.
+std::vector GetCommandLineArguments();
+
+#endif  // RUNNER_UTILS_H_
diff --git a/calculator/windows/runner/win32_window.cpp b/calculator/windows/runner/win32_window.cpp
new file mode 100644
index 00000000..60608d0f
--- /dev/null
+++ b/calculator/windows/runner/win32_window.cpp
@@ -0,0 +1,288 @@
+#include "win32_window.h"
+
+#include 
+#include 
+
+#include "resource.h"
+
+namespace {
+
+/// Window attribute that enables dark mode window decorations.
+///
+/// Redefined in case the developer's machine has a Windows SDK older than
+/// version 10.0.22000.0.
+/// See: https://docs.microsoft.com/windows/win32/api/dwmapi/ne-dwmapi-dwmwindowattribute
+#ifndef DWMWA_USE_IMMERSIVE_DARK_MODE
+#define DWMWA_USE_IMMERSIVE_DARK_MODE 20
+#endif
+
+constexpr const wchar_t kWindowClassName[] = L"FLUTTER_RUNNER_WIN32_WINDOW";
+
+/// Registry key for app theme preference.
+///
+/// A value of 0 indicates apps should use dark mode. A non-zero or missing
+/// value indicates apps should use light mode.
+constexpr const wchar_t kGetPreferredBrightnessRegKey[] =
+  L"Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize";
+constexpr const wchar_t kGetPreferredBrightnessRegValue[] = L"AppsUseLightTheme";
+
+// The number of Win32Window objects that currently exist.
+static int g_active_window_count = 0;
+
+using EnableNonClientDpiScaling = BOOL __stdcall(HWND hwnd);
+
+// Scale helper to convert logical scaler values to physical using passed in
+// scale factor
+int Scale(int source, double scale_factor) {
+  return static_cast(source * scale_factor);
+}
+
+// Dynamically loads the |EnableNonClientDpiScaling| from the User32 module.
+// This API is only needed for PerMonitor V1 awareness mode.
+void EnableFullDpiSupportIfAvailable(HWND hwnd) {
+  HMODULE user32_module = LoadLibraryA("User32.dll");
+  if (!user32_module) {
+    return;
+  }
+  auto enable_non_client_dpi_scaling =
+      reinterpret_cast(
+          GetProcAddress(user32_module, "EnableNonClientDpiScaling"));
+  if (enable_non_client_dpi_scaling != nullptr) {
+    enable_non_client_dpi_scaling(hwnd);
+  }
+  FreeLibrary(user32_module);
+}
+
+}  // namespace
+
+// Manages the Win32Window's window class registration.
+class WindowClassRegistrar {
+ public:
+  ~WindowClassRegistrar() = default;
+
+  // Returns the singleton registrar instance.
+  static WindowClassRegistrar* GetInstance() {
+    if (!instance_) {
+      instance_ = new WindowClassRegistrar();
+    }
+    return instance_;
+  }
+
+  // Returns the name of the window class, registering the class if it hasn't
+  // previously been registered.
+  const wchar_t* GetWindowClass();
+
+  // Unregisters the window class. Should only be called if there are no
+  // instances of the window.
+  void UnregisterWindowClass();
+
+ private:
+  WindowClassRegistrar() = default;
+
+  static WindowClassRegistrar* instance_;
+
+  bool class_registered_ = false;
+};
+
+WindowClassRegistrar* WindowClassRegistrar::instance_ = nullptr;
+
+const wchar_t* WindowClassRegistrar::GetWindowClass() {
+  if (!class_registered_) {
+    WNDCLASS window_class{};
+    window_class.hCursor = LoadCursor(nullptr, IDC_ARROW);
+    window_class.lpszClassName = kWindowClassName;
+    window_class.style = CS_HREDRAW | CS_VREDRAW;
+    window_class.cbClsExtra = 0;
+    window_class.cbWndExtra = 0;
+    window_class.hInstance = GetModuleHandle(nullptr);
+    window_class.hIcon =
+        LoadIcon(window_class.hInstance, MAKEINTRESOURCE(IDI_APP_ICON));
+    window_class.hbrBackground = 0;
+    window_class.lpszMenuName = nullptr;
+    window_class.lpfnWndProc = Win32Window::WndProc;
+    RegisterClass(&window_class);
+    class_registered_ = true;
+  }
+  return kWindowClassName;
+}
+
+void WindowClassRegistrar::UnregisterWindowClass() {
+  UnregisterClass(kWindowClassName, nullptr);
+  class_registered_ = false;
+}
+
+Win32Window::Win32Window() {
+  ++g_active_window_count;
+}
+
+Win32Window::~Win32Window() {
+  --g_active_window_count;
+  Destroy();
+}
+
+bool Win32Window::Create(const std::wstring& title,
+                         const Point& origin,
+                         const Size& size) {
+  Destroy();
+
+  const wchar_t* window_class =
+      WindowClassRegistrar::GetInstance()->GetWindowClass();
+
+  const POINT target_point = {static_cast(origin.x),
+                              static_cast(origin.y)};
+  HMONITOR monitor = MonitorFromPoint(target_point, MONITOR_DEFAULTTONEAREST);
+  UINT dpi = FlutterDesktopGetDpiForMonitor(monitor);
+  double scale_factor = dpi / 96.0;
+
+  HWND window = CreateWindow(
+      window_class, title.c_str(), WS_OVERLAPPEDWINDOW,
+      Scale(origin.x, scale_factor), Scale(origin.y, scale_factor),
+      Scale(size.width, scale_factor), Scale(size.height, scale_factor),
+      nullptr, nullptr, GetModuleHandle(nullptr), this);
+
+  if (!window) {
+    return false;
+  }
+
+  UpdateTheme(window);
+
+  return OnCreate();
+}
+
+bool Win32Window::Show() {
+  return ShowWindow(window_handle_, SW_SHOWNORMAL);
+}
+
+// static
+LRESULT CALLBACK Win32Window::WndProc(HWND const window,
+                                      UINT const message,
+                                      WPARAM const wparam,
+                                      LPARAM const lparam) noexcept {
+  if (message == WM_NCCREATE) {
+    auto window_struct = reinterpret_cast(lparam);
+    SetWindowLongPtr(window, GWLP_USERDATA,
+                     reinterpret_cast(window_struct->lpCreateParams));
+
+    auto that = static_cast(window_struct->lpCreateParams);
+    EnableFullDpiSupportIfAvailable(window);
+    that->window_handle_ = window;
+  } else if (Win32Window* that = GetThisFromHandle(window)) {
+    return that->MessageHandler(window, message, wparam, lparam);
+  }
+
+  return DefWindowProc(window, message, wparam, lparam);
+}
+
+LRESULT
+Win32Window::MessageHandler(HWND hwnd,
+                            UINT const message,
+                            WPARAM const wparam,
+                            LPARAM const lparam) noexcept {
+  switch (message) {
+    case WM_DESTROY:
+      window_handle_ = nullptr;
+      Destroy();
+      if (quit_on_close_) {
+        PostQuitMessage(0);
+      }
+      return 0;
+
+    case WM_DPICHANGED: {
+      auto newRectSize = reinterpret_cast(lparam);
+      LONG newWidth = newRectSize->right - newRectSize->left;
+      LONG newHeight = newRectSize->bottom - newRectSize->top;
+
+      SetWindowPos(hwnd, nullptr, newRectSize->left, newRectSize->top, newWidth,
+                   newHeight, SWP_NOZORDER | SWP_NOACTIVATE);
+
+      return 0;
+    }
+    case WM_SIZE: {
+      RECT rect = GetClientArea();
+      if (child_content_ != nullptr) {
+        // Size and position the child window.
+        MoveWindow(child_content_, rect.left, rect.top, rect.right - rect.left,
+                   rect.bottom - rect.top, TRUE);
+      }
+      return 0;
+    }
+
+    case WM_ACTIVATE:
+      if (child_content_ != nullptr) {
+        SetFocus(child_content_);
+      }
+      return 0;
+
+    case WM_DWMCOLORIZATIONCOLORCHANGED:
+      UpdateTheme(hwnd);
+      return 0;
+  }
+
+  return DefWindowProc(window_handle_, message, wparam, lparam);
+}
+
+void Win32Window::Destroy() {
+  OnDestroy();
+
+  if (window_handle_) {
+    DestroyWindow(window_handle_);
+    window_handle_ = nullptr;
+  }
+  if (g_active_window_count == 0) {
+    WindowClassRegistrar::GetInstance()->UnregisterWindowClass();
+  }
+}
+
+Win32Window* Win32Window::GetThisFromHandle(HWND const window) noexcept {
+  return reinterpret_cast(
+      GetWindowLongPtr(window, GWLP_USERDATA));
+}
+
+void Win32Window::SetChildContent(HWND content) {
+  child_content_ = content;
+  SetParent(content, window_handle_);
+  RECT frame = GetClientArea();
+
+  MoveWindow(content, frame.left, frame.top, frame.right - frame.left,
+             frame.bottom - frame.top, true);
+
+  SetFocus(child_content_);
+}
+
+RECT Win32Window::GetClientArea() {
+  RECT frame;
+  GetClientRect(window_handle_, &frame);
+  return frame;
+}
+
+HWND Win32Window::GetHandle() {
+  return window_handle_;
+}
+
+void Win32Window::SetQuitOnClose(bool quit_on_close) {
+  quit_on_close_ = quit_on_close;
+}
+
+bool Win32Window::OnCreate() {
+  // No-op; provided for subclasses.
+  return true;
+}
+
+void Win32Window::OnDestroy() {
+  // No-op; provided for subclasses.
+}
+
+void Win32Window::UpdateTheme(HWND const window) {
+  DWORD light_mode;
+  DWORD light_mode_size = sizeof(light_mode);
+  LSTATUS result = RegGetValue(HKEY_CURRENT_USER, kGetPreferredBrightnessRegKey,
+                               kGetPreferredBrightnessRegValue,
+                               RRF_RT_REG_DWORD, nullptr, &light_mode,
+                               &light_mode_size);
+
+  if (result == ERROR_SUCCESS) {
+    BOOL enable_dark_mode = light_mode == 0;
+    DwmSetWindowAttribute(window, DWMWA_USE_IMMERSIVE_DARK_MODE,
+                          &enable_dark_mode, sizeof(enable_dark_mode));
+  }
+}
diff --git a/calculator/windows/runner/win32_window.h b/calculator/windows/runner/win32_window.h
new file mode 100644
index 00000000..e901dde6
--- /dev/null
+++ b/calculator/windows/runner/win32_window.h
@@ -0,0 +1,102 @@
+#ifndef RUNNER_WIN32_WINDOW_H_
+#define RUNNER_WIN32_WINDOW_H_
+
+#include 
+
+#include 
+#include 
+#include 
+
+// A class abstraction for a high DPI-aware Win32 Window. Intended to be
+// inherited from by classes that wish to specialize with custom
+// rendering and input handling
+class Win32Window {
+ public:
+  struct Point {
+    unsigned int x;
+    unsigned int y;
+    Point(unsigned int x, unsigned int y) : x(x), y(y) {}
+  };
+
+  struct Size {
+    unsigned int width;
+    unsigned int height;
+    Size(unsigned int width, unsigned int height)
+        : width(width), height(height) {}
+  };
+
+  Win32Window();
+  virtual ~Win32Window();
+
+  // Creates a win32 window with |title| that is positioned and sized using
+  // |origin| and |size|. New windows are created on the default monitor. Window
+  // sizes are specified to the OS in physical pixels, hence to ensure a
+  // consistent size this function will scale the inputted width and height as
+  // as appropriate for the default monitor. The window is invisible until
+  // |Show| is called. Returns true if the window was created successfully.
+  bool Create(const std::wstring& title, const Point& origin, const Size& size);
+
+  // Show the current window. Returns true if the window was successfully shown.
+  bool Show();
+
+  // Release OS resources associated with window.
+  void Destroy();
+
+  // Inserts |content| into the window tree.
+  void SetChildContent(HWND content);
+
+  // Returns the backing Window handle to enable clients to set icon and other
+  // window properties. Returns nullptr if the window has been destroyed.
+  HWND GetHandle();
+
+  // If true, closing this window will quit the application.
+  void SetQuitOnClose(bool quit_on_close);
+
+  // Return a RECT representing the bounds of the current client area.
+  RECT GetClientArea();
+
+ protected:
+  // Processes and route salient window messages for mouse handling,
+  // size change and DPI. Delegates handling of these to member overloads that
+  // inheriting classes can handle.
+  virtual LRESULT MessageHandler(HWND window,
+                                 UINT const message,
+                                 WPARAM const wparam,
+                                 LPARAM const lparam) noexcept;
+
+  // Called when CreateAndShow is called, allowing subclass window-related
+  // setup. Subclasses should return false if setup fails.
+  virtual bool OnCreate();
+
+  // Called when Destroy is called.
+  virtual void OnDestroy();
+
+ private:
+  friend class WindowClassRegistrar;
+
+  // OS callback called by message pump. Handles the WM_NCCREATE message which
+  // is passed when the non-client area is being created and enables automatic
+  // non-client DPI scaling so that the non-client area automatically
+  // responds to changes in DPI. All other messages are handled by
+  // MessageHandler.
+  static LRESULT CALLBACK WndProc(HWND const window,
+                                  UINT const message,
+                                  WPARAM const wparam,
+                                  LPARAM const lparam) noexcept;
+
+  // Retrieves a class instance pointer for |window|
+  static Win32Window* GetThisFromHandle(HWND const window) noexcept;
+
+  // Update the window frame's theme to match the system theme.
+  static void UpdateTheme(HWND const window);
+
+  bool quit_on_close_ = false;
+
+  // window handle for top level window.
+  HWND window_handle_ = nullptr;
+
+  // window handle for hosted content.
+  HWND child_content_ = nullptr;
+};
+
+#endif  // RUNNER_WIN32_WINDOW_H_