Fast: Intermittent Fasting App

55 of 100 · reviews
4.7of 5 · store
3,286ratings on the App Store
201reviews read

An editorial reading of the saved reviews

Fast uses an educational timer that shows fasting phases (blood sugar drop, fat-burning zone, ketosis) in real time. A buddy system adds social motivation. Analytics are buggy, fast start times cannot be edited retroactively, and the app occasionally crashes.

Screenshots

What people use it for

People who find it easier to stay on track with a group and want to understand what is happening in their body hour by hour.

What reviews praise

A live timer with named metabolic phases keeps users aware of exactly what is happening right now.
Buddy fasting with real-time status of friends adds accountability.

What reviews complain about

The fast history adds ghost entries and shows incorrect hours on the All tab.
You cannot change the start time of a completed fast.
Achievements do not save.

What users experience

1 excerpt from the breakdown. These are individual cases, not a verdict on all users.

I've tried every fasting app and always come back to this one. My favorite feature is the timer that also educational. It helps awareness of your internal process like when you are lowering your blood sugar, in the fat burning zone, the ketosis zone. It is extremely motivational!