Best Fasting Apps in 2026: 8 Apps Compared

Zero is the app many people think of first when they hear "fasting tracker", and the numbers back that up. On the US App Store it has a 4.8-star rating from more than 445,000 ratings, and it is available on iPhone and Android.

The free app handles fasting timers, streaks and progress. The paid Zero Plus subscription layers on photo-based meal logging with macros, a personal daily protein target, water tracking and challenges. The App Store lists Zero Plus purchase options at $9.99, $69.99 and $89.99.

The catch is that Zero has grown into a nutrition app, and the listing pushes Zero Plus hard. If all you want is a clock and a history, a simpler app below may suit you better. Zero's own listing also notes it is not a medical device.

Fastic positions itself as a free fasting app with extra weight loss tools. Its App Store listing describes a fasting timer, a photo food scanner, water reminders, a step counter, a personal Fastic Score and an AI chat for guidance. Fastic's site says the app has more than 30 million downloads.

It is a good fit for someone who wants fasting and food tracking in one place without opening a separate calorie app. The design is friendly and motivating.

Two things to know. The App Store lists many Fastic Plus prices, from $12.99 up to $79.99, so check the exact plan and length before paying. And the listing claims fasting can slow aging and prevent diabetes; treat those as marketing, not medical guidance.

BodyFast is one of the older fasting apps, and its listing claims more than 50 million installs. The free version is generous: more than ten customizable fasting plans, a timer with reminders, weight and body measurement tracking, a water tracker and a guide to fasting stages.

The paid BodyFast Coach builds a new fasting plan each week based on your progress, adds daily tips, weekly challenges and 100+ recipes. App Store prices for the Coach range from $11.99 for one month to $69.99 for twelve months, depending on the offer.

It suits people who like being told what to do each week. If you prefer to set your own schedule and keep it, the free tier may be all you need.

Simple started as an intermittent fasting app and has grown into an AI weight loss coach. Its site says it will recommend a fasting schedule that suits your weight loss goals, and the free version includes answers from its AI coach Avo, nutrition scores and its habit trackers.

The app also offers photo-based food feedback, simple workouts and a mascot named Blinky who reacts to your logging. For people who find strict tracking boring, that playful approach can help with consistency.

The trade-off is focus. If you want a dedicated fasting timer with detailed fasting history, Zero or FastHabit is more direct. The App Store lists Simple Pro and Premium from $14.99 to $59.99.

Window's free tier covers the basics well: a fasting timer, reminders when your window opens or closes, a weight journal, a water tracker and articles from nutritionists. It also syncs with Apple Watch and Apple Health.

Premium adds a personalized program, every fasting plan, daily meal suggestions, mood and nutrition tracking and habit challenges. The App Store shows Premium at $14.99 for one month, yearly options from $39.99 to $89.99 and a $4.99 weekly plan.

It has a 4.5-star rating from about 10,600 ratings, far fewer than the leaders. Watch for the weekly plan, which costs much more over a year than an annual subscription.

FastHabit is for people who want to track fasts without lessons, scores or mascots. Set your fast length, start the timer and see percent complete, time remaining and your target end time. Its website lists iPhone, Android and Apple Watch versions.

Extras include reminders, weight tracking with a fasting overlay, calendar views, support for multi-day fasts and data export. The App Store lists a $2.99 Pro upgrade and an optional annual Premium subscription at $59.99. Its rating is 4.8 stars from about 13,900 ratings.

The downside is that it will not tell you what to eat or build a plan for you. If you need structure, BodyFast or Fastic fits better.

Fasty is a small, independent app with a big following: a 4.9-star App Store rating from about 52,000 ratings. Its standout feature is privacy, since it works without an account or sign-up. You start a timer, set a goal and keep a history you can edit.

Apple fans get a lot for free, including the Apple Watch app, Home Screen and Lock Screen widgets, Live Activities and Siri Shortcuts. You can also import and export your data as CSV. Paid options range from a Basic tier at $0.99 a month to Pro at $6.99 a month, $19.99 a year or $49.99 once.

The obvious limit is platform. Its website presents it as an iPhone and Apple Watch app, with no Android version, and the listing is clear that it does not recommend a fasting plan or give medical advice.

Easy Fast is our pick for the best free fasting app. Its website says the fasting timer, the open-ended Flexi Plan, weight tracking and fast editing are free forever, with zero ads. Popular daily fasts like 16:8 and 18:6 are included without paying.

Easy Fast Pro is an optional upgrade that adds advanced plans, cloud sync and backup, and support for watches. The App Store lists Pro at $9.99 and $49.99. On the US App Store it holds a 5.0-star average from about 9,100 ratings.

The catch is scale. Easy Fast is run by a solo developer, so features may arrive more slowly than at bigger companies. For a free, ad-free timer on either iPhone or Android, though, it is hard to beat.