diff --git a/app/(tabs)/_layout.tsx b/app/(tabs)/_layout.tsx
index c36e1c9..ead68ab 100644
--- a/app/(tabs)/_layout.tsx
+++ b/app/(tabs)/_layout.tsx
@@ -203,11 +203,14 @@ export default function TabLayout() {
       }
 
       // Delay to let TTS fully release audio focus, then restart STT
+      // iOS: 300ms for smooth audio fade
+      // Android: 50ms (Audio Focus releases immediately)
+      const delay = Platform.OS === 'android' ? 50 : 300;
       const timer = setTimeout(() => {
         if (sessionActiveRef.current) {
           safeStartSTT();
         }
-      }, 300); // 300ms to ensure TTS audio fully fades
+      }, delay);
       return () => clearTimeout(timer);
     }
 
diff --git a/app/(tabs)/chat.tsx b/app/(tabs)/chat.tsx
index 0db1e6c..87e68e4 100644
--- a/app/(tabs)/chat.tsx
+++ b/app/(tabs)/chat.tsx
@@ -497,15 +497,6 @@ export default function ChatScreen() {
             </Text>
           </View>
         </View>
-        {/* TTS Stop button - only visible when speaking */}
-        {isSpeaking && (
-          <TouchableOpacity
-            style={[styles.headerButton, styles.speakingButton]}
-            onPress={stopTTS}
-          >
-            <Ionicons name="volume-high" size={22} color={AppColors.primary} />
-          </TouchableOpacity>
-        )}
         <TouchableOpacity
           style={styles.headerButton}
           onPress={() => setSortNewestFirst(prev => !prev)}
diff --git a/app/(tabs)/index.tsx b/app/(tabs)/index.tsx
index 47abf3b..447dfbb 100644
--- a/app/(tabs)/index.tsx
+++ b/app/(tabs)/index.tsx
@@ -149,6 +149,10 @@ export default function HomeScreen() {
             user_id: ${userId || 'null'}
           };
           localStorage.setItem('auth2', JSON.stringify(authData));
+
+          // Set is_mobile flag to hide navigation bar
+          localStorage.setItem('is_mobile', '1');
+
           console.log('Auth injected:', authData.username);
 
           // Monitor page content for session expired messages