FastHabit Intermittent Fasting 4+

Track your fasts and progress

Reflectly ApS

Designed for iPhone

    • 4.8 • 12.7K Ratings
    • Free
    • Offers In-App Purchases


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
- FastHabit also integrates with Apple HealthKit. This lets you sync your logged weight in the app automatically to your HealthKit profile. FastHabit also pulls in updated weight data from HealthKit if enabled, to always keep your weight data in sync across the board.

- 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

FastHabit has been featured in GQ, the Guardian, and Fast Company.


FastHabit offers an optional auto-renewing annual Premium Subscription (price varies by territory, may include free trial) located on the Upgrade page. Payments will be charged to your iTunes Account after confirmation. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the subscription period. Account will be charged for renewal within 24 hours prior to the end of the current period. Subscriptions may be managed in your iTunes Account’s Settings after purchasing. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable.

Privacy Policy:
Terms of Service:

What’s New

Version 2.10.1

Update, ahoy!

Today's update includes some under-the-hood performance improvements and squashes a few pesky little bugs.

If you're loving FastHabit, please let us know by leaving a review! :)

Ratings and Reviews

4.8 out of 5
12.7K Ratings

12.7K Ratings

Turrican888 ,

Simple, effective. Apple Watch is killer feature

I was surprised how hard it was to find an app that could work as an effective ‘glorified timer’, Fast Habit is the best of the five I tried. It doesn’t try to bilk you for subscriptions, and the free functionality is more than enough if you’re just getting started (though I paid up for the pro upgrade after a week because the app is so good). My fave view on the phone is it’s calendar; it’s like using Jerry Springer’s ‘don’t break the chain’ productivity hack to keep a streak going!

So saying I’m addicted to my phone so have taken to keeping it powered off in a drawer in favour of the watch, so having the watch complication + modular watch face is just perfect - it’s pretty much how I use the app daily now.

If there was one thing I could add to the pro version it would be for a reminder option that counts down from when you end you fast, rather than a fixed time of day. So if I’m 16/8 but I end up doing 15 or 17 instead, I’d like to set a reminder when my 8 hour window is up (though I can ask Siri to do that anyway so not the end of the world).

Thincor ,

Simple, effective fasting app

I tried all the popular IF apps, and this is the only one I stuck with. Why? It’s simple, and the Pro Upgrade is a one-and-done payment not a subscription. Very worth the $2.99 upgrade. It’s a tracking clock that is completely editable, a weight tracker, and a few different ways to view your progress, including a graph that superimposes your fasting times on your weight chart, so you can see which fasting schedule works best for your weight loss. The fasting clock lets you view your progress by counting down (time remaining + % complete), counting up (time fasted), or just % complete.

You can set a fasting window, but can edit it on the fly in the main screen, which makes this a truly useful app for those of us who do not stick to rigid fasting windows, plus you can add or edit fasts any time (if you forgot to start or stop the clock).

No social media, no need to be connected to the internet to use, just a simple, well designed fasting app. I’ve been using it for over a year now. Love it!

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

App Privacy

The developer, Reflectly ApS, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Purchases
  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

More By This Developer

Health & Fitness
Health & Fitness
Health & Fitness

You Might Also Like

Health & Fitness
Health & Fitness
Health & Fitness
Health & Fitness
Health & Fitness
Health & Fitness