Tsuzuku

A private, offline-first Android habit tracker, focus timer, and minimal launcher built with Kotlin, Jetpack Compose, Material 3, Room, and DataStore.

✨ Features

- Habit tracking 🎯 What Tsuzuku does: Create habits, add descriptions, pick icons/colors, check in daily, and review active or managed habits.

- Streak engine 🔥 What Tsuzuku does: Calculates current streaks, best streaks, total completions, and retroactive check-ins from local logs.

- Insights 📊 What Tsuzuku does: Shows global habit stats, consistency score, weekly activity, top habits, yearly heatmaps, and per-habit calendars.

- Focus mode 🧘 What Tsuzuku does: Runs timed focus sessions, tracks completed/failed sessions, monitors phone pickup events, supports allowed mistakes, and can use Do Not Disturb.

- Minimal launcher 🏠 What Tsuzuku does: Optional HOME launcher mode with a clock, quotes, widgets, Phone access, Camera shortcut, and a limited allowed-app list.

- Reminders 🔔 What Tsuzuku does: Local Android reminders with configurable reminder time and notification permission handling on Android 13+.

- Motivation 💬 What Tsuzuku does: Bundled bilingual quotes and mantras, available offline in the app and launcher.

- Privacy 🔐 What Tsuzuku does: Habit names/descriptions are encrypted before storage, and core habit/focus data stays on the device.

- Portability 📦 What Tsuzuku does: JSON backup and restore for habits, logs, and focus sessions from the Settings screen.

- Personalization 🎨 What Tsuzuku does: Material 3 themes, custom accent color support, launcher widgets, and focus-environment options.

License

MIT