Stay at Zero
Free intermittent fasting app
A calm intermittent fasting app — fasting timer, calendar, and stats. Full core stays free, without paywall popups in the way.
Goals are hours, not a meal plan: 16h is 16:8, 18h is 18:6, 20h is 20:4. 14h is 14:10; 36h and open-ended are for longer fasts. You track the fast — the eating window stays yours.
Fasting focused
See the whole fast
Start, goal, and end on one timeline. Completed or abandoned stays honest — no vanity metrics, no meal log crowding the session.
Calendar
See your year of fasts
Month grids and a year view so patterns and streaks stay visible — habit history, not only a stopwatch.
Statistics
Length, patterns, streaks
Understand when you fast and how long — without photo fatigue. Bring history with you via export and import.
Rich core
Full fasting app. Stays free.
Timer, calendar, stats, and guest mode are here today and stay free forever — never moved behind a paywall. Optional add-ons may appear later. They will not show up as nagging modals that interrupt daily use.
- Works as guest Full use on your device — no account required.
- Your history Export and import backups so your data stays yours.
- No nagging paywalls We will not interrupt a fast — or the rest of daily use — with upgrade modals. If add-ons appear, they stay optional and out of the way.
- Account & cloud sync Work in progress — coming when servers are ready. Not required to use the app. When it ships, it also counts as part of the free core.
Account sync — work in progress
Privacy-shaped
Local-first by default
Guest history stays on your device. On this site, analytics run only after you choose Accept. In the app, product analytics stay off until you allow them — and you can turn them off in Settings anytime. Read the Privacy Policy.
Open Stay at Zero
Start as a guest. No install wall, no paywall modal — just the web app.