Habit Tracking
Create habits with descriptions, icons, colors, reminders, active lists, archived habits, and daily check-ins.
Private Android productivity
Tsuzuku
Tsuzuku means "to continue" or "to keep going".
A private, offline-first Android habit tracker, focus timer, minimal launcher, and insights companion for people who want fewer distractions and steadier daily progress.
Offline-firstNo cloud account needed for core features
Android 7+Min SDK 24, target SDK 36
Open sourceMIT licensed Kotlin and Compose app
Product
Everything in one calm loop
Plan habits, protect focus time, make the launcher quieter, and review progress without sending your daily life to a server.
Streak Engine
Track current streaks, best streaks, total completions, retroactive check-ins, and completion history from local logs.
Focus Mode
Run timed focus sessions with completed and failed session history, phone-pickup discipline, allowed mistakes, and optional Do Not Disturb support.
Minimal Launcher
Use Tsuzuku as an optional Android home launcher with a clock, quotes, widgets, phone access, camera shortcut, and allowed-app controls.
Insights
Review global stats, consistency score, weekly activity, top habits, yearly heatmaps, and per-habit calendars.
Local Portability
Export and restore habits, check-ins, focus sessions, and settings with user-initiated JSON backup files.
Focus + launcher
Keep useful apps close and distractions further away
Tsuzuku Launcher can become the Android HOME experience when you choose it. It keeps essential shortcuts available, supports allowed apps, shows focus-friendly widgets, and can apply focus-environment settings while sessions are active.
Phone and camera shortcuts Allowed-app controls Local reminders and focus notifications
Screens
Built around real app surfaces
Home dashboard
Privacy model
Your habits stay yours
Tsuzuku is designed around local-first use. It stores habit and focus data in the app's local Room database, schedules reminders on the device, and gives users control over backup files.
Core habit, focus, and launcher workflows work without a cloud account.
Habit names and descriptions are encrypted before local storage.
Reminders are scheduled locally with Android system APIs.
Backup and restore are started by the user from local JSON files.
The app is built to be ad-free and analytics-free.
Roadmap
A focused productivity ecosystem
Tsuzuku Habits
Core habit creation, check-ins, streak tracking, reminders, insights, and backup.
Tsuzuku Focus
Timed sessions, discipline tracking, focus history, and distraction controls.
Tsuzuku Launcher
A minimal Android launcher for essential apps and lower-distraction phone use.
Tsuzuku Widgets
Home and launcher widgets for habits, streaks, focus sessions, quotes, and quick check-ins.
Tsuzuku AI Integration
Optional habit ideas, reflection prompts, summaries, and productivity guidance with privacy-first defaults.