flutter_local_smart_notifications

A typed, local-only notification service for Flutter. Show notifications immediately, schedule them for later, repeat them on a recurring basis, and create persistent alarm-style reminders, all through a single Dart API.

The package owns the difficult platform details so your app does not have to: permissions, exact alarms, time zones, reboot recovery, pending-notification limits, and notification-tap routing.

Local only. This package does not include Firebase Cloud Messaging, OneSignal, or any other push SDK. If your app also needs server-triggered push notifications, keep that integration in a separate package or adapter.

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Table of contents

• Features
• When to use this package
• Supported platforms
• Requirements
• Installation
• Getting started
• Usage
  • Show an instant notification
  • Add notification actions
  • Schedule a notification
  • Create a persistent reminder
  • Handle taps and actions
  • Cancel and inspect notifications
• Error handling with NotificationResult
• Permissions
• Example application
• Limitations
• Release checklist
• Documentation

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Features

Capability	Typical use cases	API
Instant notification	Immediate local events and status updates	showNotification
Scheduled notification	One-time future alerts	scheduleNotification
Recurring schedule	Daily, weekly, monthly, and yearly routines	scheduleNotification
Persistent reminder	Alarm-like, high-priority user tasks	showReminder, scheduleReminder
Android reminder actions	Done, Snooze, Review, Dismiss, Open	ReminderNotification.actions
Exact timing	Precise, user-visible deadlines	exactTiming: true
Wall-clock timing	Same local time after the user travels	localWallClock
Absolute timing	The same global instant everywhere	absoluteInstant
Tap routing	Navigate after a tap or action	onRoutingEvent
Pending inspection	Display or debug scheduled IDs	getPendingScheduled
Cancellation	Remove one or all notifications	cancel* methods

Highlights

• Typed results, not exceptions. Every public operation returns NotificationResult<T>, so expected runtime conditions (missing permission, past time, platform limits) are values your app can display or recover from.
• Explicit time-zone semantics. Choose between localWallClock ("every day at 09:00 where the user is now") and absoluteInstant ("at this exact moment globally").
• Honest exact alarms. An exact request is never silently downgraded to an inexact schedule. If Android exact-alarm access is unavailable, you receive ExactAlarmPermissionFailure.
• Routing that survives the background. Tap and action events are persisted first, then delivered through onRoutingEvent after the next successful initialization.
• Lifecycle recovery. Persistent reminders are stored and reconciled on the next initialization. Android boot restoration works when your app declares the documented boot receiver.
• Platform-neutral permissions. Typed statuses, a configurable permission dialog, a denial cooldown, a bounded settings-return wait, and a re-check when the app resumes. No upstream plugin enums leak into your code.
• Pending-limit awareness. Capacity is checked before scheduling. On iOS, the budget respects the platform's 64-pending-notification cap and the slots reserved in ReminderConfig.

When to use this package

Use it when the device can decide when to notify:

• Instant: an expense was recorded, a download finished, a local message was saved, a form needs attention, or a background task completed.
• Scheduled: a bill due in two hours, a meeting reminder, a trial-expiry warning, a medication reminder, or a delivery window.
• Recurring: daily habits and check-ins, weekly budget reviews, monthly rent or statement reminders, yearly birthdays, renewals, or tax dates.
• Persistent reminders: a critical bill due date, a medication alarm, an attendance or check-in deadline, a safety or monitoring alert, or any task that should remain visible until handled.

It does not fetch remote messages. Pair it with a separate push adapter if a server must trigger delivery.

Supported platforms

Platform	Supported
Android	✅
iOS	✅

Requirements

• Flutter 3.38.1 or newer
• Dart 3.11.3 or newer
• Android compile SDK 35 or newer (when building for Android)
• Java 17 and core-library desugaring (Android)
• A real device or emulator for delivery tests. Unit and widget tests can run without a notification-capable device.

Installation

Add the package to your app's pubspec.yaml:

dependencies:
  flutter_local_smart_notifications: ^0.0.1

Then fetch dependencies:

flutter pub get

Native setup

Native setup is required before testing on a device. This package intentionally does not modify your Android manifest, Gradle files, iOS Podfile, or iOS project settings, because every app has different product requirements.

See doc/SETUP.md for:

• Android permissions and receivers
• Exact-alarm access and Google Play policy considerations
• Java 17, compile SDK 35, and desugaring
• Android launcher and notification resources, and custom sounds
• iOS permission-handler configuration
• iOS's pending-notification limit
• The platform verification matrix

Getting started

1. Add the package and complete the native setup.
2. Declare your notification channels.
3. Initialize the service once.
4. Request permission from a user-visible screen.
5. Call showNotification, scheduleNotification, or showReminder.
6. Handle the returned NotificationResult instead of assuming delivery succeeded.

1. Configure

Create a file such as lib/notification_config.dart. A configuration has three key parts:

• enabledProviders turns on the capabilities your app needs.
• channels declares every channel a payload may use.
• androidDefaultIcon names a native Android resource used for notifications.

import 'dart:ui';

import 'package:flutter_local_smart_notifications/flutter_local_smart_notifications.dart';

const notificationConfig = NotificationConfig(
  enabledProviders: {
    NotificationFeature.localInstant,
    NotificationFeature.localScheduled,
    NotificationFeature.localReminder,
  },
  channels: [
    NotificationChannelConfig(
      id: 'general',
      name: 'General',
      description: 'General application notifications',
      importance: ChannelImportance.high,
    ),
    NotificationChannelConfig(
      id: 'reminders',
      name: 'Reminders',
      description: 'Time-sensitive reminders',
      importance: ChannelImportance.max,
    ),
  ],
  androidDefaultIcon: '@mipmap/ic_launcher',
  androidDefaultColor: Color(0xFF4CAF50),
  permissionConfig: PermissionConfig(
    autoRequestOnInit: false,
    dialogTitle: 'Enable notifications',
    dialogMessage: 'Allow notifications so important reminders arrive on time.',
    openSettingsLabel: 'Open settings',
    notNowLabel: 'Not now',
  ),
);

NotificationProvider is a backwards-compatible alias for NotificationFeature; either name is valid.

Every channelId used in a NotificationPayload must be present in channels. Otherwise the operation returns ChannelNotRegisteredFailure.

2. Initialize once

Initialization validates the configuration, prepares the platform plugin, restores persisted routing and reminder state, and checks the current permission status.

import 'package:flutter_local_smart_notifications/flutter_local_smart_notifications.dart';

Future<void> initializeNotifications() async {
  final result = await NotificationService.initialize(notificationConfig);

  result.fold(
    onSuccess: (service) {
      service.onRoutingEvent.listen((event) {
        // Navigate using event.target and read extra values from event.data.
        print('Notification route: ${event.target}');
      });
    },
    onFailure: (failure) {
      // Show a useful message or log the typed failure.
      print('Notification setup failed: ${failure.message}');
    },
  );
}

Call this once at app startup, for example after WidgetsFlutterBinding.ensureInitialized() and before runApp.

• Only one active runtime is permitted at a time. Do not create multiple runtimes with different configurations. Call await service.dispose() before replacing the configuration (for example, in a test).
• NotificationService.instance is always safe to read. Before initialization completes, operations return NotInitializedFailure rather than throwing.

3. Request permission

Connect permission prompts to a user-visible action, such as an "Enable notifications" button. Avoid surprising users with a dialog on a splash screen unless that is an intentional product decision.

Future<void> enableNotifications(BuildContext context) async {
  final result = await NotificationService.instance.requestPermission(
    context: context,
  );

  if (!context.mounted) return;

  result.fold(
    onSuccess: (status) {
      if (status.isGranted) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Notifications are enabled.')),
        );
      } else {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Current status: ${status.runtimeType}')),
        );
      }
    },
    onFailure: (failure) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text(failure.message)),
      );
    },
  );
}

For features that need precise timing, request notification permission and exact-alarm access together, and only when the user chooses such a feature:

final result = await NotificationService.instance.requestPermission(
  context: context,
  includeExactAlarm: true,
);

includeExactAlarm never silently makes a schedule inexact. If Android exact-alarm access is unavailable, the operation returns ExactAlarmPermissionFailure.

Usage

Show an instant notification

final result = await NotificationService.instance.showNotification(
  const NotificationPayload(
    id: 1,
    title: 'Expense recorded',
    body: 'Your coffee expense was added.',
    channelId: 'general',
    data: {'route': '/expenses'},
  ),
);

if (result.isFailure) {
  print(result.failureOrNull);
}

The id is the platform notification ID. Reusing an ID updates or replaces the notification on platforms that support it. Use unique IDs when you want multiple alerts to remain visible.

NotificationPayload fields

Field	Description
id	Numeric platform notification ID.
title	Notification title.
body	Notification body.
channelId	One of the channels declared in NotificationConfig.
data	JSON-like routing and application data.
soundName	Optional key registered in soundAssets.
silent	Requests silent presentation.

Add notification actions

Android reminder actions let a user respond without opening the app. Action taps are delivered through the same routing stream as notification taps.

const reminder = ReminderNotification(
  payload: NotificationPayload(
    id: 2,
    title: 'Review purchase',
    body: 'A large purchase needs your attention.',
    channelId: 'general',
    data: {'route': '/expenses/2'},
  ),
  actions: [
    NotificationAction(id: 'review', title: 'Review'),
    NotificationAction(
      id: 'dismiss',
      title: 'Dismiss',
      cancelNotification: true,
      openApp: false,
    ),
  ],
);

await NotificationService.instance.showReminder(reminder);

• cancelNotification controls whether the notification is removed after the action.
• openApp controls whether the action opens the app, where the platform supports that choice.
• Android action taps require the action receiver described in doc/SETUP.md.

Schedule a notification

Use ScheduledNotification when delivery should happen in the future or repeat:

final result = await NotificationService.instance.scheduleNotification(
  ScheduledNotification(
    payload: const NotificationPayload(
      id: 42,
      title: 'Daily check-in',
      body: 'Record today’s expense.',
      channelId: 'reminders',
      data: {'route': '/dashboard'},
    ),
    scheduledTime: DateTime.now().add(const Duration(minutes: 1)),
    repeatInterval: RepeatInterval.none,
    allowWhileIdle: true,
    exactTiming: false,
    semantics: NotificationScheduleSemantics.absoluteInstant,
  ),
);

The scheduled time must be in the future. A past time returns PastTimeFailure.

Repeat intervals

Value	Behavior	Example
RepeatInterval.none	Deliver once	Meeting reminder
RepeatInterval.daily	Repeat every day	Medication, check-ins
RepeatInterval.weekly	Repeat every week	Weekly planning, budget review
RepeatInterval.monthly	Repeat every month	Rent, subscriptions, statements
RepeatInterval.yearly	Repeat every year	Birthdays, renewals, taxes

Choose the time-zone meaning

This choice matters when a user travels or changes the device time zone.

// "Every day at the user's local 09:00."
semantics: NotificationScheduleSemantics.localWallClock,

// "The same absolute moment everywhere."
semantics: NotificationScheduleSemantics.absoluteInstant,

Semantics	Use for
localWallClock	Habits, medication, morning check-ins, and other time-of-day reminders
absoluteInstant	Deadlines, expiry moments, and events tied to one global instant

Persistent wall-clock reminders are re-synchronized after the package detects a device time-zone change during initialization.

Exact versus inexact timing

Set exactTiming: true only when the product requirement justifies precise timing. Android may require the user to grant the exact-alarm special access. The package checks that access and returns ExactAlarmPermissionFailure when it is unavailable. It does not silently downgrade the request.

Use exact alarms only when the requirement justifies the extra permission and the associated platform policy review.

Create a persistent reminder

Reminders are intended for high-priority, alarm-like experiences. They can be instant or scheduled.

final result = await NotificationService.instance.scheduleReminder(
  ReminderNotification(
    payload: const NotificationPayload(
      id: 300,
      title: 'Bill due soon',
      body: 'Your electricity bill is due today.',
      channelId: 'reminders',
      data: {'route': '/bills/electricity'},
    ),
    scheduledTime: DateTime.now().add(const Duration(minutes: 2)),
    timeout: const Duration(minutes: 10),
    persistent: true,
    fullScreenIntent: false,
    exactTiming: true,
    actions: const [
      NotificationAction(id: 'done', title: 'Done'),
      NotificationAction(id: 'snooze', title: 'Snooze'),
    ],
    semantics: NotificationScheduleSemantics.absoluteInstant,
  ),
);

Use showReminder instead when scheduledTime is null and the reminder should appear immediately. ReminderNotification.isInstant reports which form an object represents.

Field	Description
timeout	How long the reminder stays active before timing out.
persistent	Requests an ongoing, harder-to-dismiss presentation.
fullScreenIntent	Requests an alarm-like full-screen presentation. Use only when genuinely needed, and verify platform and store policy separately.
exactTiming	Requests exact scheduling for a scheduled reminder.
actions	Reminder-specific action buttons.
semantics	Absolute-instant or local-wall-clock meaning.

ReminderConfig limits active reminders and pending notifications, controls exact alarm delivery by default, and can enable reboot recovery.

Handle taps and actions

Subscribe after successful initialization:

service.onRoutingEvent.listen((event) {
  switch (event.target) {
    case '/expenses':
      // Navigate to the expenses page.
      break;
    case '/bills/electricity':
      // Navigate to the bill details page.
      break;
  }

  print('source=${event.source} interaction=${event.interaction}');
  print('actionId=${event.actionId} data=${event.data}');
});

Put a route and any small JSON-like values in NotificationPayload.data. This works for foreground taps, app-launch taps, and background action or tap events.

RoutingEvent contains:

Property	Description
target	The route or target name, from data['route'] or data['target'].
actionId	The tapped action, when an action caused the event.
data	The original payload data.
source	local, scheduled, or reminder.
interaction	tap, action, dismiss, or timeout.
timestamp	When the routing event was created.

Background callbacks cannot access the singleton or in-memory UI state. The package persists the event first and delivers it through onRoutingEvent after the next initialization.

Cancel and inspect notifications

await NotificationService.instance.cancelNotification(42);
await NotificationService.instance.cancelScheduled(42);
await NotificationService.instance.cancelReminder(300);

final pending = await NotificationService.instance.getPendingScheduled();
pending.fold(
  onSuccess: (ids) => print('Pending scheduled IDs: $ids'),
  onFailure: (failure) => print(failure.message),
);

await NotificationService.instance.cancelAllScheduled();
await NotificationService.instance.cancelAllReminders();
await NotificationService.instance.cancelAll();

cancelNotification cancels the matching notification through the enabled local and scheduled providers. Use the provider-specific methods when you want the intent to be explicit.

Error handling with NotificationResult

Every public operation returns NotificationResult<T>:

final result = await NotificationService.instance.showNotification(payload);

if (result.isSuccess) {
  print('Notification request accepted by the platform.');
} else {
  final failure = result.failureOrNull!;
  print('${failure.runtimeType}: ${failure.message}');
}

For a single expression, use fold:

final message = result.fold(
  onSuccess: (_) => 'Done',
  onFailure: (failure) => failure.message,
);

Common failures

Failure	Resolution
NotInitializedFailure	Initialize first, or wait for initialization to finish.
ProviderNotEnabledFailure	Enable the feature in NotificationConfig.
PermissionNotGrantedFailure	Request notification access.
ExactAlarmPermissionFailure	Ask for exact-alarm access, or use inexact timing.
ChannelNotRegisteredFailure	Add the payload's channel to the config.
PastTimeFailure	Choose a future schedule time.
PlatformLimitExceededFailure	Reduce pending notifications or adjust the reminder budget.
ReminderLimitExceededFailure	Cancel reminders or increase maxActiveReminders.
UnsupportedPlatformFailure	Run the operation on a supported platform.

See the complete list in doc/API.md.

Permissions

The package exposes its own platform-neutral status types:

Status	Meaning
PermissionNotDetermined	The user has not answered yet.
PermissionGranted	Normal notification access is granted.
PermissionDenied	Access is denied but may be requested again.
PermissionPermanentlyDenied	The user must use system settings.
PermissionRestricted	The platform restricts access.
PermissionProvisional	iOS provisional access. Counts as granted.

Use status.isGranted, status.isDenied, and status.canRequest rather than inspecting platform plugin enums.

Permission is checked at initialization and whenever the app resumes.

Example application

The example/ app is a capability lab that demonstrates every supported notification and scheduling mode:

• App-level expense notification configuration
• Instant notification cases
• One-shot and recurring schedules
• Both time-zone semantics
• Persistent reminders and full-screen policy
• Cancellation and pending-ID cases
• Deterministic widget and unit tests

cd example
flutter pub get
dart run flutter_launcher_icons
flutter run
flutter test

Limitations

• Remote push notifications are not supported.
• Android manifest entries and iOS project settings are not added to your app automatically.
• Exact schedules are never silently downgraded to inexact schedules.
• Dart code cannot run immediately after an Android reboot. Native boot restoration plus next-launch reconciliation are used instead.
• A permission revocation cannot be observed while the app is fully closed. Permission is checked at initialization and on app resume.

Release checklist

Before shipping a notification feature:

1. Test a fresh install with permission granted and denied.
2. Test permanent denial and opening system settings.
3. Test Android API 31, 33, 34, and 35+.
4. Test exact-alarm grant and refusal.
5. Test both an exact and an inexact schedule.
6. Test a device reboot with the boot receiver declared.
7. Change the device time zone and verify both schedule semantics.
8. Tap the notification, tap each action, and test a background tap.
9. Test iOS pending-notification capacity.
10. Verify that every operation displays or logs its NotificationFailure.

Documentation

• Public API reference
• Consumer native setup
• Architecture and lifecycle model
• Runnable example app

Libraries

flutter_local_smart_notifications

Public API for the Flutter Local Smart Notifications package.

notifications/core/config/notification_channel_config

notifications/core/config/notification_config

notifications/core/config/permission_config

notifications/core/config/reminder_config

notifications/core/constants/defaults

notifications/core/logger/notification_logger

notifications/d_print

notifications/data/repositories/local/local_notification_repository

notifications/data/repositories/local/local_notification_repository_impl

notifications/data/repositories/local/local_notification_repository_stub

notifications/data/repositories/permission/permission_repository

notifications/data/repositories/permission/permission_repository_impl

notifications/data/repositories/permission/permission_repository_stub

notifications/data/repositories/reminder/reminder_notification_repository

notifications/data/repositories/reminder/reminder_notification_repository_impl

notifications/data/repositories/reminder/reminder_notification_repository_stub

notifications/data/repositories/scheduled/scheduled_notification_repository

notifications/data/repositories/scheduled/scheduled_notification_repository_impl

notifications/data/repositories/scheduled/scheduled_notification_repository_stub

notifications/data/routing/notification_response_codec

notifications/data/routing/routing_event_bus

notifications/data/storage/notification_storage_impl

notifications/domain/entities/notification_action

notifications/domain/entities/notification_payload

notifications/domain/entities/notification_result

notifications/domain/entities/permission_status

notifications/domain/entities/reminder_notification

notifications/domain/entities/routing_event

notifications/domain/entities/scheduled_notification

notifications/domain/failures/notification_failure

notifications/domain/repositories/i_local_notification_repository

notifications/domain/repositories/i_notification_logger

notifications/domain/repositories/i_notification_storage

notifications/domain/repositories/i_permission_repository

notifications/domain/repositories/i_reminder_notification_repository

notifications/domain/repositories/i_scheduled_notification_repository

notifications/domain/usecases/cancel_notification_usecase

notifications/domain/usecases/cancel_reminder_usecase

notifications/domain/usecases/schedule_notification_usecase

notifications/domain/usecases/schedule_reminder_usecase

notifications/domain/usecases/show_instant_notification_usecase

notifications/domain/usecases/show_reminder_usecase

notifications/infrastructure/di/notification_service_factory

notifications/presentation/dialogs/default_permission_dialog

notifications/presentation/dialogs/i_permission_dialog

notifications/presentation/notification_service