Best Water Fasting App

250+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated September 2026

The best water fasting app on iPhone average 4.6★ across 250+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.

Compare top Water Fasting App (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Zero: Fasting & Food TrackerZero: Fasting & Food TrackerFree4.8★ (445K)NoYesSep 2026
2H2 flow water fastingH2 flow water fastingFree3.0★ (4)NoYesAug 2026
3Water Fasting: Tracker & TimerWater Fasting: Tracker & TimerFree5.0★ (2)NoYesAug 2026
4Fasting Tracker • Easy FastFasting Tracker • Easy FastFree5.0★ (8.6K)NoYesSep 2026
5Simple: AI Weight Loss CoachSimple: AI Weight Loss CoachFree4.7★ (401K)NoYesSep 2026
6Intermittent Fasting Tracker:Intermittent Fasting Tracker:Free4.9★ (51K)NoYesSep 2026
7FastEasy: Intermittent FastingFastEasy: Intermittent FastingFree4.6★ (79K)NoYesSep 2026
8Water Reminder - Daily TrackerWater Reminder - Daily TrackerFree4.7★ (78K)NoYesSep 2026

Top Picks for Water Fasting App

Zero: Fasting & Food Tracker#1

Zero: Fasting & Food Tracker by Zero Longevity Science, Inc.

Track Diet, Protein & Calorie
Editor's Choice
💪 Health & Fitness
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
H2 flow water fasting#2

H2 flow water fasting by Martijn Nelissen

your water-fast companion
Strong Contender
💪 Health & Fitness
3.0(4 ratings)
FreeIn-App Purchases
H2 flow water fasting screenshot 1
H2 flow water fasting screenshot 2
H2 flow water fasting screenshot 3
H2 flow water fasting screenshot 4
H2 flow water fasting screenshot 5

This app guides users through water fasting with hydration tracking and mindful prompts. It offers science-based tools to support metabolic renewal and help users achieve fasting goals, from short to multi-day protocols.

Water Fasting: Tracker & Timer#3

Water Fasting: Tracker & Timer by SUKRU DEMIR

Mindful Fasts, Water & Stages
Worth Considering
💪 Health & Fitness
5.0(2 ratings)
FreeIn-App Purchases
Water Fasting: Tracker & Timer screenshot 1
Water Fasting: Tracker & Timer screenshot 2
Water Fasting: Tracker & Timer screenshot 3

Track your fasting journey with a visually engaging water orb timer. Understand your body's stages, log hydration, and gain personalized wellness insights. Offers science-backed information and a premium minimalist design.

More Water Fasting App apps to explore

FAQ about Water Fasting App

What is the best water fasting app for iPhone?
Zero: Fasting & Food Tracker tops our water fasting app ranking as of September 2026, with a 4.8-star average from 445K App Store ratings, and it's free to download.
Yes — 20 of the top water fasting app we rank are free to download, including Zero: Fasting & Food Tracker and H2 flow water fasting.
Zero: Fasting & Food Tracker has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 250+ water fasting app on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
Zero is an all-in-one fasting tracker and nutrition app designed to help users achieve real body composition changes. It integrates intermittent fasting timers, protein tracking, meal logging, hydration, and habit tracking to provide a comprehensive approach to weight loss and metabolic health.
Key features include timers and streaks for intermittent fasting, smart meal logging with photo recognition for instant macro and protein analysis, personalized daily protein target tracking, water and habit tracking, and science-based insights from experts on fasting and nutrition.

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