Best Fasting Calculator Apps

249+ iOS apps curated and reviewed

4.8 avg rating
19 free apps
Updated September 2026

The best fasting calculator apps on iPhone average 4.8★ across 249+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.

Compare top Fasting Calculator Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Intermittent Fasting Tracker:Intermittent Fasting Tracker:Free4.9★ (51K)NoYesSep 2026
2Zero: Fasting & Food TrackerZero: Fasting & Food TrackerFree4.8★ (445K)NoYesSep 2026
3Fasting Tracker & Diet AppFasting Tracker & Diet AppFree4.6★ (12K)NoNoSep 2026
4Fasting CenterFasting CenterFree4.7★ (12)NoNoSep 2026
5Intermittent Fasting Tracker -Intermittent Fasting Tracker -Free4.9★ (29K)YesYesSep 2026
6Daniel Fast CalculatorDaniel Fast CalculatorFreeYesYesJul 2026
7FastHabit Intermittent FastingFastHabit Intermittent FastingFree4.8★ (14K)NoYesSep 2026
8Just FastingJust FastingFreeNoNoMay 2026

Top Picks for Fasting Calculator

Intermittent Fasting Tracker:#1

Intermittent Fasting Tracker: by Kai Oelfke

Simple 16:8 Fast Timer
Editor's Choice
💪 Health & Fitness
4.9😊(51K ratings)
FreeIn-App Purchases
Intermittent Fasting Tracker: screenshot 1
Intermittent Fasting Tracker: screenshot 2
Intermittent Fasting Tracker: screenshot 3
Intermittent Fasting Tracker: screenshot 4
Intermittent Fasting Tracker: screenshot 5
Intermittent Fasting Tracker: screenshot 6

This app offers a straightforward and private way to track intermittent fasting. It supports iPhone and Apple Watch, providing essential features like widgets, notifications, and progress charts without any advertisements. Ideal for both beginners and experienced fasters, it focuses on a simple user interface to support health and wellness goals.

What We Love

  • 👍 Simple and easy to use
  • 🚀 Straightforward fasting tracking
  • 🔒 No ads or subscriptions
  • 💡 Customizable fasting times
  • 👍 Clean and intuitive interface
  • 🚀 Seamless integration with Apple Health
  • 👍 Helpful fasting stage information
  • 💡 Ability to edit start/end times
  • 👍 Useful statistics and progress tracking

Room to Improve

  • 🐛 Occasional issues with time tracking
  • 💡 Desire for more customization options
  • 💡 Request for monthly/yearly fasting view
  • 💡 Interest in adding notes or logging features
4.8😊(445K ratings)
FreeIn-App Purchases
Zero: Fasting & Food Tracker screenshot 1
Zero: Fasting & Food Tracker screenshot 2
Zero: Fasting & Food Tracker screenshot 3
Zero: Fasting & Food Tracker screenshot 4
Zero: Fasting & Food Tracker screenshot 5
Zero: Fasting & Food Tracker screenshot 6

This app tracks intermittent fasting and nutrition to help users achieve real body composition changes. It integrates fasting, protein intake, meals, hydration, and habits for a holistic approach to weight loss and metabolic health.

What We Love

  • 🚀 Easy to use
  • 📊 Helpful tracking and data
  • 💡 Informative learning resources
  • 🔍 Detailed fasting information
  • 🤝 Sense of community
  • 🎉 Motivating badges and challenges

Room to Improve

  • 💰 Expensive premium subscription
  • 🔒 Forced account creation
  • 🙄 Intrusive ads and upsells
  • 🤔 Inconsistent or confusing UI changes
  • 🐛 Syncing and login issues
  • 🙅‍♀️ Lack of free features
Fasting Tracker & Diet App#3

Fasting Tracker & Diet App by Hendrik Folkerts

Simple Fast Timer 16:8 & 5:2
Worth Considering
💪 Health & Fitness
4.6😊(12K ratings)
Free
Fasting Tracker & Diet App screenshot 1
Fasting Tracker & Diet App screenshot 2
Fasting Tracker & Diet App screenshot 3

Easily manage your intermittent fasting schedule with this simple timer. Track your fasting and meal times, explore various fasting methods, and discover trends in your progress. Maintain a healthy lifestyle with a user-friendly interface.

What We Love

  • 🚀 Great app
  • 👍 Simple and easy to use
  • 💡 Helpful for tracking fasting
  • 🚀 Effective for weight loss
  • 👍 No subscription or ads

Room to Improve

  • 🐛 Cannot edit start/stop times
  • 🐛 Inaccurate fasting history tracking
  • 🐛 Continues running timer after fast ends
  • 💡 Lack of fasting history/calendar view

More Fasting Calculator apps to explore

FAQ about Fasting Calculator

What are the best fasting calculator apps for iPhone?
Intermittent Fasting Tracker: tops our fasting calculator apps ranking as of September 2026, with a 4.9-star average from 51K App Store ratings, and it's free to download.
Yes — 19 of the top fasting calculator apps we rank are free to download, including Intermittent Fasting Tracker: and Zero: Fasting & Food Tracker.
Intermittent Fasting Tracker: has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 249+ fasting calculator apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
This app helps you track your intermittent fasting periods with a simple interface. It provides essential features like interactive widgets, notifications, streaks, badges, charts, and trends to help you stay on track with your fasting goals. It is designed to be privacy-friendly with no ads or account sign-up required.
Key features include interactive widgets for quick access, customizable notifications to remind you of your fasting windows, streak tracking and badges to motivate you, detailed charts and trends to monitor your progress, fasting zones, iCloud sync for data backup, and a dark mode option for comfortable viewing.

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