FastHabit Intermittent Fasting

• FastHabit Premium — $59.99
• Upgrade To Pro — $2.99

Last verified 5 Sep 2026

4.8 13882 ratings · App Store

1. 5/5Simple, 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).

   Turrican888 · 5 Sep 2026

2. 5/5Simple, 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!

   Thincor · 5 Sep 2026

3. 5/5I 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. ALSO THE WATCH APP IS PERFECT! 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 analog/digital Color options Different graph options

   Lalandmine · 5 Sep 2026

4. 5/5This app is underrated

   This app doesn’t get the love it deserves in fasting app listicles. I bothered to upgrade because it’s not a subscription and I think the service is worth it. The interface is lovely and clean (I like blue, personally) and easy to use. It’s not cluttered with tips, “inspiration”, or weird chat groups. If you’re looking for a simple, clean, fasting app this one is for you. My only wish would be that I would like a small Apple Watch complication. I like the large one with the time left, but it takes up a lot of real estate and requires you use a specific type of watch face. I would love to see one that gives you your hours left diagonally (to fit in the corner of a circular dial face), as well as just a normal, small “hours left” complication. Also if there was a widget for the iPhone, that would be awesome (okay, that’s two wish list items I guess!)

   emily-knits · 5 Sep 2026

5. 5/5Fantastic 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.

   DeltaVictorBravo · 5 Sep 2026

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