Best Free Fasting Calculator Apps

250+ iOS apps curated and reviewed

4.5 avg rating
20 free apps
Updated September 2026

Looking for free free fasting calculator apps? 20 of our 250+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top Free Fasting Calculator Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Fasting CenterFasting CenterFree4.6★ (10)NoNoSep 2026
2Fasting Tracker & Diet AppFasting Tracker & Diet AppFree4.6★ (12K)NoNoSep 2026
3Zero: Fasting & Food TrackerZero: Fasting & Food TrackerFree4.8★ (445K)NoYesSep 2026
4Fastic Weight Loss & FastingFastic Weight Loss & FastingFree4.8★ (246K)NoYesSep 2026
5FastEasy: Intermittent FastingFastEasy: Intermittent FastingFree4.6★ (79K)NoYesSep 2026
6Intermittent Fasting Tracker:Intermittent Fasting Tracker:Free4.9★ (51K)NoYesSep 2026
7Fasting Tracker App by NumifyFasting Tracker App by NumifyFree4.7★ (5.6K)NoYesSep 2026
8Simple Fasting CalculatorSimple Fasting CalculatorFreeNoNoMay 2026

Top Picks for Free Fasting Calculator

Fasting Tracker & Diet App#2

Fasting Tracker & Diet App by Hendrik Folkerts

Simple Fast Timer 16:8 & 5:2
Strong Contender
💪 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
Zero: Fasting & Food Tracker#3
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

More Free Fasting Calculator apps to explore

FAQ about Free Fasting Calculator

What are the best free fasting calculator apps for iPhone?
Fasting Center tops our free fasting calculator apps ranking as of September 2026, with a 4.6-star average from 10 App Store ratings, and it's free to download.
Fasting Center has no ads and has no in-app purchases, according to its App Store listing as of September 2026.
We track 250+ free fasting calculator apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
Fasting Center is a planning and estimation tool designed to help users plan extended fasts. It provides personalized projections of weight change, fat loss, and energy use based on user-inputted stats and desired fast duration.
No, Fasting Center is a planning and estimation tool and does not provide medical advice. Users are strongly advised to consult a healthcare provider before starting any extended fast, especially if they have underlying health conditions.