HabitTimer

This application demonstrates habit tracking with timer functionality for HarmonyOS wearable devices. It uses the Preferences API for data persistence and provides a wearable-optimized interface for tracking time spent on daily habits like reading, exercise, meditation, study, and practice.

Preview

Use Cases

• Daily Habit Tracking: Track time spent on important habits with automatic daily reset at midnight.
• Focus Timer: Use as a stopwatch to measure time spent on activities with start/pause/reset controls.
• Progress Monitoring: View daily and total time invested in each habit on your wrist.

Tech Stack

• Languages: ArkTS
• Frameworks: HarmonyOS SDK 5.1.0 (API 18)
• Tools: DevEco Studio 5.1.0 or later
• APIs: @kit.AbilityKit, @kit.ArkUI, @kit.ArkData (Preferences API)

Directory Structure

entry/src/main/ets/
|---entryability
|   |---EntryAbility.ets              // Application lifecycle management
|---pages
|   |---Index.ets                     // Main UI with timer and habit list
|---services
|   |---HabitService.ets              // Timer and habit business logic
|   |---PreferencesService.ets        // Data persistence wrapper
|---models
|   |---HabitModel.ets                // Data types and interfaces

Constraints and Restrictions

Supported Device

• HarmonyOS wearable devices supporting SDK 5.1.0 (API 18)
• Huawei Watch GT series (with ArkTS support)
• Huawei Watch D series (with ArkTS support)

Limitations

• Timer pauses when app goes to background; must be manually restarted when returning to foreground.
• Habits are pre-configured in code; no UI to add/remove/edit habits.
• Uses Preferences API for storage; not suitable for extensive historical data tracking.

License

HabitTimer is distributed under the terms of the MIT License.

See the LICENSE for more information.