The fasting app that fasts with you.
No account. No subscription. No coach in your pocket narrating your hunger. Just one beautiful ring on your iPhone, Apple Watch, and Home Screen — keeping perfect time while you get on with the day.
Pay once. No account, no subscription, nothing to cancel.
Four things Fastful will never do.
No pressure
Streaks and milestones celebrate showing up — then forgive the day you don’t. No dopamine loops, no "streak in danger", no guilt engineered into a timer.
No subscription
Pay once and it’s yours — this version and every update to it. Fastful costs less than the lunch you’re skipping.
No personal data
No account, no ads, no tracking across apps. Your history lives on your phone — we couldn’t read it if we wanted to. Only anonymous feature statistics ever leave the app.
Read our privacy policyNo lock-in
Your fasting history exports to CSV in one tap and opens in any spreadsheet. It’s your data — take it anywhere.
This is the whole app.
Five screens. There is no sixth. Nothing to set up before you start, nothing behind a paywall, nothing to learn.
It counts what others cut off.
Past your goal, the ring keeps going. Hour 17 of a 16-hour fast is the one you’re proudest of — your discipline doesn’t stop at 100%, and neither does Fastful.
Whatever your reason.
For health
Run 16:8, 18:6, 20:4, OMAD, or any custom window. Start in two taps, glance at the ring, and get on with your day.
For faith
A quiet companion for fasting days. No food ads, no calorie lectures — just the time, kept faithfully, while you stay present.
For longevity
Take on 24 to 72-hour resets with a timer built for the long haul: elapsed, remaining, and every extra hour counted.
For discipline
Totals and trends that keep score the way a good friend would. The honest work of showing up, made visible.
And the essentials
- Full Apple Watch app — start, track, and end fasts from your wrist
- Home Screen and Lock Screen widgets with the same live ring
- History as a calendar or list, grouped by month
- Edit any fast after the fact — fix the night you forgot to stop the timer
- Add a fast by hand, for the one you finished before opening the app
- Daily reminders on the days and time you choose
- A notification the moment you hit your goal
- One-tap CSV export
- Built natively for iPhone and Apple Watch
- Speaks ten languages, from English and Spanish to Japanese, Korean, and Simplified Chinese
- No sign-in. Nothing to set up. Works offline forever
Read the manifestoEveryone selling a fasting app is selling a subscription to not eating. Fasting is ancient, free, and already yours. The timer beside it should be cheap, quiet, and yours too.
What people say
Nothing here yet — Fastful is new, and I’d rather show you an empty page than a quote I wrote myself. If it has earned a place on your Home Screen, tell me. I read every message, and the good ones will end up right here.
Tell me how it’s going →
Start your next fast on a clean timer.
Eat. Don’t eat. Either way, Fastful stays exactly where you left it.
Pay once. No account, no subscription, nothing to cancel.