FastHabit helps you start and stay consistent with Intermittent Fasting. Set your fast length, log daily, and use advanced features like reminders, weight tracking and Health App syncing, Apple Watch integration, calendar views, data export, and multi-day fasting to track your progress and accelerate your results.

- Choose how many hours you want to fast
- Keep your motivation in view- See percent complete, time completed, time remaining, and target end.
- Easy editing. Stop, restart, or adjust your fast at any time.

- Apple Watch integration: Leave your phone at home and still track your fast.
- Save and transfer your fasts to a new device with iCloud syncing
- Sync your weight tracking with your Apple Health App profile

- Choose the days and times you want reminders to start fasting
- Get a notification when your fast is complete

- 10 day Snapshot with ‘streaks’ to show how many days in a row you’ve fasted and how many days you’ve met your goals – a great way to stay motivated.
- Calendar and weekly views with daily details
- Weight tracking views with fasting overlay

- Apple watch complications
- iPhone widget
- Getting started guide
- Enhanced support for longer, multi-day fasts
- Export your data

Fast Habit has been featured in GQ, the Guardian, and Fast Company.
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What’s New

Version 2.9.4

Improvements to weight tracking charts

Ratings and Reviews

4.8 out of 5
8.5K Ratings

8.5K Ratings

Lalandmine ,

I like it so much I paid!

A fasting app doesn’t need a ton of complicated features. I downloaded a few and the others didn’t work out for me because of their rigidity with times/schedule. Sometimes I eat on accident or sleep late, or I want to fast longer than I intended. Other apps made it hard to adjust for those things “on the fly” while you have a fast going.

This app shines for its simplicity and also its versatility! I’m new to fasting (few weeks now) so I can’t always make it to a “set time”, but that’s ok! You can set a goal (16hrs for me) and then click start when you’re done eating. The app will remind you when you’re close to reaching your goal, but you can easily go past the goal or stop early if needed. You just click stop. I don’t know why other apps make it harder than that.

Seeing my fasts on a weekly timeline has really helped me see the overall picture of how I’m doing and motivated me to beat my best times.

I can easily check my wrist for time elapsed/time remaining if I’m driving or when I need to quickly set a mealtime with friends. I don’t want to always drag my phone out to do that. Also, being able to START and STOP a fast on the watch is invaluable. If I didn’t have the watch app I would likely forget what time when I went to add it in my phone.

Edits are easy too.

I would pay MORE for additional display options like:
different style timers
Color options
Different graph options

DeltaVictorBravo ,

Fantastic app, but one glitch needs to be addressed

I tried many apps to help with fasting, and this is the one that fit the bill. Very easy to start fasting or to adjust it if you forgot to start it right at the moment. Also, the alerts and reminders make it very simple, and it’s great to be able to see a graph chart it against bodyweight. Does exactly what it needs to do, without being over-complicated.

One glitch needs to be addressed, though. After you finish your feeding Session for the day, naturally you’re going to start another fast. When tapping the button to start the fast, an error alert comes up and says that you have already had one fasting session started that day, and starting a new one will erase the one prior. Of course, the earlier one is the one that started yesterday. I was able to go ahead and start it anyway, and it did not erase anything. However, it was unnerving. This should be addressed.

There is an option to contact support from within the app, but it goes to some strange email that bounces back an error to my email system. Sadly, this means the only way for me to provide the feedback is through this review. So maybe that’s two glitches that need to be addressed :-).

Nonetheless, it was the best fasting management app that I have found. Worth the money for the pro version.

kdkjfsldfjs ,

Love this app!

I love it! I tried a bunch of different IF apps and this has the simplest, most intuitive interface with no glitches so far! I also SO appreciate that there is no paid subscription, just a one time pro purchase. My favorite features are how easy it is to time your fasts based on start and end times AND/OR duration, and how the weight loss graph overlays with fasting hours!

I wish this app had only three additional features... the ability to set a weight goal, and the ability to see which fasting zones you’re in, and the ability to add exercise minutes as needed. I’d love to see these features toggle on and off in the app settings so I could have the option to keep the interface as simple as I’d like. Love it!! Keep it coming.


whitespectre corp
61 MB

Requires iOS 9.0 and watchOS 4.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
In-App Purchases
  1. Upgrade To Pro $2.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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