Add an additional permission in case that's why Android is not alarming.

android/app/src/main/AndroidManifest.xml

@@ -47,4 +47,5 @@
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
     <uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM"/>
+    <uses-permission android:name="android.permission.USE_EXACT_ALARM"/>
 </manifest>

lib/main.dart

@@ -173,6 +173,7 @@ class _HomeScreenState extends State<HomeScreen> {
   Timer? _alarmTimer;
 
   Future<void> _scheduleAlarm() async {
+    // Ensure that Android has the correct permissions enabled.
     final canSchedule = await android?.canScheduleExactNotifications();
     if (canSchedule != true) {
       _showSnack('Permissions not yet granted, requesting...');
@@ -220,7 +221,7 @@ class _HomeScreenState extends State<HomeScreen> {
       _showSnack(
         'Alarm set for ${alarmTime.hour.toString().padLeft(2, '0')}:${alarmTime.minute.toString().padLeft(2, '0')} (app must stay open)',
       );
-    } else {
+    } else if (Platform.isAndroid) {
       // Android: use zonedSchedule (works in background)
       final tzAlarm = tz.TZDateTime.from(alarmTime, tz.local);
       const androidDetails = AndroidNotificationDetails(
@@ -243,6 +244,8 @@ class _HomeScreenState extends State<HomeScreen> {
             UILocalNotificationDateInterpretation.absoluteTime,
       );
       _showSnack('Alarm scheduled.');
+    } else {
+      _showSnack('Platform not detected, unsure how to show alarm.');
     }
   }