diff --git a/example_app/ui/index.html b/example_app/ui/index.html
index 7a2d595..43b8198 100644
--- a/example_app/ui/index.html
+++ b/example_app/ui/index.html
@@ -542,6 +542,14 @@ <h1>AI Security Command Center</h1>
               Admin JWT:
               <input id="token" type="password" placeholder="Paste admin JWT for ledger + evidence" />
             </label>
+            <label>
+              Data source:
+              <select id="dataSource">
+                <option value="auto">Auto</option>
+                <option value="live">Live only</option>
+                <option value="demo">Demo only</option>
+              </select>
+            </label>
             <button id="saveToken">Save Token</button>
             <button id="refreshAll" class="primary">Refresh</button>
           </div>
@@ -699,7 +707,9 @@ <h2>Evidence & ABOM</h2>
       const activityEl = document.getElementById("activity");
       const demoBannerEl = document.getElementById("demoBanner");
       const topRisksEl = document.getElementById("topRisks");
+      const dataSourceEl = document.getElementById("dataSource");
       const tokenKey = "ocpa_admin_token";
+      const dataSourceKey = "ocpa_data_source";
       let demoMode = false;
 
       function setStatus(msg) {
@@ -806,6 +816,17 @@ <h2>Evidence & ABOM</h2>
         return localStorage.getItem(tokenKey) || "";
       }
 
+      function getDataSource() {
+        return localStorage.getItem(dataSourceKey) || "auto";
+      }
+
+      function setDataSource(value) {
+        localStorage.setItem(dataSourceKey, value);
+        if (dataSourceEl) {
+          dataSourceEl.value = value;
+        }
+      }
+
       function authHeaders() {
         const token = getToken();
         if (!token) {
@@ -1200,6 +1221,7 @@ <h2>Evidence & ABOM</h2>
         let summaryFallback = false;
         let demoInjected = false;
         let demoEvents = null;
+        const dataMode = getDataSource();
         try {
           const health = await fetchJson("/health");
           renderOpaStatus(health.opa_status);
@@ -1245,52 +1267,67 @@ <h2>Evidence & ABOM</h2>
           errors.push(`inventory: ${err.message}`);
         }
 
-        try {
-          const summary = await fetchJson("/risk/summary?limit=500", true);
-          renderSummary(document.getElementById("summary"), summary);
-        } catch (err) {
-          summaryError = err;
-          summaryFallback = demoMode;
-          if (!demoMode) {
-            errors.push(`summary: ${err.message}`);
-            if (summaryMetaEl && /401|403/.test(err.message)) {
-              summaryMetaEl.textContent = "Admin JWT required to view counts.";
-            }
-            if (postureBadgeEl) {
-              postureBadgeEl.textContent = "Locked";
-              postureBadgeEl.className = "posture-value posture-locked";
-            }
-            if (postureSignalsEl) {
-              postureSignalsEl.textContent = "Signals in window: --";
+        if (dataMode === "demo") {
+          demoInjected = true;
+          demoEvents = buildDemoEvents();
+          renderSummary(document.getElementById("summary"), buildDemoSummary(demoEvents));
+        } else {
+          try {
+            const summary = await fetchJson("/risk/summary?limit=500", true);
+            renderSummary(document.getElementById("summary"), summary);
+          } catch (err) {
+            summaryError = err;
+            summaryFallback = demoMode && dataMode === "auto";
+            if (!(demoMode && dataMode === "auto")) {
+              errors.push(`summary: ${err.message}`);
+              if (summaryMetaEl && /401|403/.test(err.message)) {
+                summaryMetaEl.textContent = "Admin JWT required to view counts.";
+              }
+              if (postureBadgeEl) {
+                postureBadgeEl.textContent = "Locked";
+                postureBadgeEl.className = "posture-value posture-locked";
+              }
+              if (postureSignalsEl) {
+                postureSignalsEl.textContent = "Signals in window: --";
+              }
             }
           }
         }
 
-        try {
-          const ledger = await fetchJson("/ui/ledger?limit=200", true);
-          if (demoMode && (!ledger.events || ledger.events.length === 0)) {
-            demoInjected = true;
-            demoEvents = buildDemoEvents();
-            renderLedger(document.getElementById("ledger-body"), demoEvents);
-            renderRiskDrivers(demoEvents);
-            renderActivity(demoEvents);
-            renderTopRisks(demoEvents);
-          } else {
-            renderLedger(document.getElementById("ledger-body"), ledger.events);
-            renderRiskDrivers(ledger.events);
-            renderActivity(ledger.events);
-            renderTopRisks(ledger.events);
-          }
-        } catch (err) {
-          if (demoMode) {
-            demoInjected = true;
-            demoEvents = buildDemoEvents();
-            renderLedger(document.getElementById("ledger-body"), demoEvents);
-            renderRiskDrivers(demoEvents);
-            renderActivity(demoEvents);
-            renderTopRisks(demoEvents);
-          } else {
-            errors.push(`ledger: ${err.message}`);
+        if (dataMode === "demo") {
+          demoInjected = true;
+          demoEvents = demoEvents || buildDemoEvents();
+          renderLedger(document.getElementById("ledger-body"), demoEvents);
+          renderRiskDrivers(demoEvents);
+          renderActivity(demoEvents);
+          renderTopRisks(demoEvents);
+        } else {
+          try {
+            const ledger = await fetchJson("/ui/ledger?limit=200", true);
+            if (dataMode === "auto" && demoMode && (!ledger.events || ledger.events.length === 0)) {
+              demoInjected = true;
+              demoEvents = buildDemoEvents();
+              renderLedger(document.getElementById("ledger-body"), demoEvents);
+              renderRiskDrivers(demoEvents);
+              renderActivity(demoEvents);
+              renderTopRisks(demoEvents);
+            } else {
+              renderLedger(document.getElementById("ledger-body"), ledger.events);
+              renderRiskDrivers(ledger.events);
+              renderActivity(ledger.events);
+              renderTopRisks(ledger.events);
+            }
+          } catch (err) {
+            if (demoMode && dataMode === "auto") {
+              demoInjected = true;
+              demoEvents = buildDemoEvents();
+              renderLedger(document.getElementById("ledger-body"), demoEvents);
+              renderRiskDrivers(demoEvents);
+              renderActivity(demoEvents);
+              renderTopRisks(demoEvents);
+            } else {
+              errors.push(`ledger: ${err.message}`);
+            }
           }
         }
 
@@ -1318,10 +1355,18 @@ <h2>Evidence & ABOM</h2>
           errors.push(`summary: ${summaryError.message}`);
         }
 
+        const sourceLabel =
+          demoInjected || dataMode === "demo"
+            ? "demo"
+            : dataMode === "live"
+              ? "live"
+              : demoMode
+                ? "auto"
+                : "live";
         if (errors.length) {
-          setStatus(`Updated with warnings: ${errors.join(" | ")}`);
+          setStatus(`Updated (${sourceLabel}) with warnings: ${errors.join(" | ")}`);
         } else {
-          setStatus(demoInjected ? "Updated (demo data active)." : "Updated.");
+          setStatus(`Updated (${sourceLabel}).`);
         }
         if (lastUpdatedEl) {
           lastUpdatedEl.textContent = `Last refresh: ${new Date().toLocaleTimeString()}`;
@@ -1385,6 +1430,13 @@ <h2>Evidence & ABOM</h2>
       document.getElementById("downloadOpenApi").addEventListener("click", () => downloadOpenApi("json"));
 
       tokenEl.value = getToken();
+      if (dataSourceEl) {
+        dataSourceEl.value = getDataSource();
+        dataSourceEl.addEventListener("change", (event) => {
+          setDataSource(event.target.value);
+          refreshAll();
+        });
+      }
       refreshAll();
     </script>
   </body>