diff --git a/ios/App/App/CoachLiveBridge.swift b/ios/App/App/CoachLiveBridge.swift
index 7a1c4e0..2d35013 100644
--- a/ios/App/App/CoachLiveBridge.swift
+++ b/ios/App/App/CoachLiveBridge.swift
@@ -14,6 +14,9 @@
 import Foundation
 import Capacitor
 import WatchConnectivity
+import os
+
+private let liveLog = Logger(subsystem: "ch.hypnotruck.coach", category: "live")
 
 @objc(CoachLiveBridgePlugin)
 public class CoachLiveBridgePlugin: CAPPlugin, CAPBridgedPlugin {
@@ -46,6 +49,8 @@ public class CoachLiveBridgePlugin: CAPPlugin, CAPBridgedPlugin {
     }
 
     private func emit(_ sample: [String: Any]) {
+        let hr = (sample["heartRate"] as? Double) ?? -1
+        liveLog.info("liveSample reçu de la Watch hr=\(hr, privacy: .public)")
         CAPLog.print("⚡️ CoachLiveBridge: liveSample reçu de la Watch -> \(sample)")
         DispatchQueue.main.async { [weak self] in
             self?.notifyListeners("liveSample", data: sample)
diff --git a/ios/App/CoachWatch/ConnectivityManager.swift b/ios/App/CoachWatch/ConnectivityManager.swift
index 6e32f3f..e1dd9a6 100644
--- a/ios/App/CoachWatch/ConnectivityManager.swift
+++ b/ios/App/CoachWatch/ConnectivityManager.swift
@@ -1,5 +1,8 @@
 import Foundation
 import WatchConnectivity
+import os
+
+private let connLog = Logger(subsystem: "ch.hypnotruck.coach.watchkitapp", category: "connectivity")
 
 /// Envoie les samples de séance vers l'iPhone.
 /// - `sendMessage` quand l'iPhone est joignable (temps réel)
@@ -23,6 +26,8 @@ final class ConnectivityManager: NSObject, ObservableObject {
     func sendSample(_ payload: [String: Any]) {
         queue.async {
             let session = WCSession.default
+            let hr = (payload["heartRate"] as? Double) ?? -1
+            connLog.info("sendSample activated=\(session.activationState == .activated, privacy: .public) reachable=\(session.isReachable, privacy: .public) hr=\(hr, privacy: .public)")
             guard session.activationState == .activated else {
                 self.buffer.append(payload)
                 return
diff --git a/ios/App/CoachWatch/ContentView.swift b/ios/App/CoachWatch/ContentView.swift
index b3088d3..fa46a19 100644
--- a/ios/App/CoachWatch/ContentView.swift
+++ b/ios/App/CoachWatch/ContentView.swift
@@ -5,10 +5,19 @@ struct ContentView: View {
     @EnvironmentObject private var workout: WorkoutManager
 
     var body: some View {
-        if workout.isRunning {
-            LiveWorkoutView()
-        } else {
-            ActivityPickerView()
+        Group {
+            if workout.isRunning {
+                LiveWorkoutView()
+            } else {
+                ActivityPickerView()
+            }
+        }
+        .task {
+            // Déclenchement auto du mode test (validation simulateur) :
+            // SIMCTL_CHILD_AUTOSIM=1 xcrun simctl launch …
+            if ProcessInfo.processInfo.environment["AUTOSIM"] == "1" {
+                workout.startSimulation()
+            }
         }
     }
 }