diff --git a/NucleicRemote/NucleicRemote/NucleicRemoteApp.swift b/NucleicRemote/NucleicRemote/NucleicRemoteApp.swift
index 450a3a3..7b055d8 100644
--- a/NucleicRemote/NucleicRemote/NucleicRemoteApp.swift
+++ b/NucleicRemote/NucleicRemote/NucleicRemoteApp.swift
@@ -3,12 +3,21 @@ import SwiftUI
 @main
 struct NucleicRemoteApp: App {
     @StateObject private var store = RemoteStore()
+    @Environment(\.scenePhase) private var scenePhase
 
     var body: some Scene {
         WindowGroup {
             RootView()
                 .environmentObject(store)
-                .onAppear { store.onAppear() }
+                .onAppear {
+                    store.onAppear()
+                    // Anonymous, opt-out, once-a-day DAU heartbeat (docs/CLOUD_INFRA.md §4).
+                    Task { await HeartbeatReporter.reportIfDue() }
+                }
+                // Re-check on every foreground so a new active day is counted.
+                .onChange(of: scenePhase) { _, phase in
+                    if phase == .active { Task { await HeartbeatReporter.reportIfDue() } }
+                }
         }
     }
 }