Lessen
Add good. Lessen bad.
Lessen is a habit tracker built with Expo/React Native. It tracks both build habits (do more of something) and quit habits (relapse-tracking, 'stay clean' streaks) — every stats function treats them as true opposites instead of bolting quit-tracking onto a build-only model. Habits support task, count, or time goals, with flexible recurrence: daily, specific weekdays, every-N-days, weekly, monthly, or a fixed day of month. A dedicated occurrence model attributes each weekly or monthly habit to a single day per period, so a weekly success never gets counted as seven daily completions in the heatmaps and streaks. Global and per-habit reminders draw from a curated, multi-language notification pool (8 languages) shaped by your onboarding answers. Everything — habits, completions, streaks, settings — stays on-device, with full JSON export/import for moving to a new phone.
Available on
Built with
Everything you need, nothing you don't
Build & Quit Habits
Build & Quit Habits
01Track habits to build (drink water, gym) and habits to quit (smoking) — quit habits invert success logic so a clean day counts, not a marked one.
Task, Count, or Time Goals
Task, Count, or Time Goals
02Simple done/not-done, tap-to-increment counters, or an in-app minute timer — pick what fits the habit.
Flexible Recurrence
Flexible Recurrence
03Daily, specific weekdays, every-N-days, weekly, monthly, or a fixed day of month, each with optional start/end dates.
GitHub-Style Heatmap & Streaks
GitHub-Style Heatmap & Streaks
04Occurrence-based statistics ensure weekly and monthly habits never inflate streaks or heatmaps like daily ones do.
Curated Notifications
Curated Notifications
05Morning/evening nudges and per-habit reminders drawn from a curated, 8-language message pool shaped by your onboarding answers.
100% Offline
100% Offline
06No account, no server. Full JSON export/import for backup or moving to a new phone.
See it in action
Home
Add Habit
Habit Detail
Statistics
Calendar
Simple, transparent pricing
No hidden fees. Cancel anytime. Start free.
Free
- ✓Unlimited build & quit habits
- ✓Task, count & time goals
- ✓Flexible recurrence & reminders
- ✓Heatmap, streaks & statistics
- ✓Full backup & restore
- ✓No account, no ads, no tracking
Questions about pricing? Send me an email.
Common questions
No. Lessen works fully offline — no account, no login, no server.
Marking a quit habit records a relapse, not a success — streaks and stats count clean days instead, so the logic mirrors how quitting actually works.
Not currently. Lessen is Android-only for now.
Yes. Settings → Data lets you export your full habit history to a file and import it again, e.g. when switching phones.
No. Lessen has no ads and no data collection.
Ready to try Lessen?
Lessen is a habit tracker built with Expo/React Native. Coming soon — star the repo to stay updated.