
FastOnce: Fasting Timer
Intermittent fasting tracker
0 ratings
$4.99
About
One giant button. That is the whole app.
Tap it to start a fast, tap it to end. A real 24-hour clock face shows exactly where your fast sits in the day, not an abstract bar.
Available in English, Spanish, French, Arabic, Russian, Hindi and Ukrainian.
WHY FASTONCE
Nearly every fasting app rents you a timer. You answer a quiz, hand over an email, and then pay monthly for a clock. FastOnce asks for none of that. One purchase, no account, no network calls at all, and it opens straight onto the button.
WHAT YOU GET
A dial that actually reads as time
The ring wraps a 24-hour wall clock, so you can see at a glance that your fast ends at 8pm rather than decoding a percentage.
Plans that fit your day
12:12, 14:10, 16:8, 18:6, 20:4 and OMAD, or set your own hours. You can also pick the time you want to finish and the length is worked out for you.
Forgot to hit start
Backdate the start time and the ring, the stages and every reminder recalculate instantly.
Stages, explained in plain language
Blood sugar drop, fat burning, ketosis and autophagy, each with a short friendly explanation. No clinical claims, no scare tactics.
Streaks and history
A month calendar of completed fasts, current and longest streaks, and charts of hours fasted per day.
Gentle nudges, only if you want them
Optional pings at the halfway mark, at each stage, when your fast completes, and short encouragement while you are in it. Quiet overnight.
A home-screen widget
Your current fast at a glance without opening anything.
PRIVACY
FastOnce is fully offline. There is no account, no analytics, no advertising and no server. Everything stays on your iPhone.
FastOnce shares general wellbeing information, not medical advice. Talk to a doctor before changing your eating habits.
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What's New in FastOnce
1.5
August 1, 2026
Your schedule can now run itself. - New: Repeat automatically. When your fast completes, an eating window opens and counts down in green. When it closes, the next fast starts on its own. Fast all week without touching a button. - A notification at every switch: when the eating window opens and when the next fast begins. - Ending a fast early while repeating opens your eating window right away, and the schedule keeps going. - The widget now shows the open eating window and your next fast time, in a look that matches the app.
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