Comparison

Waterfaster vs Fasting Center

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Waterfaster

Track intermittent and water fasts with live countdowns on your Lock Screen and widgets. Monitor your body's progress and connect with friends anonymously for support and challenges. Offers various fasting protocols and integrates with Apple Health.

Highlights
  • Live Lock Screen and widget countdowns
  • Anonymous social fasting with friends
  • Support for various fasting protocols
  • Apple Health integration
  • Hydration and electrolyte guidance
  • Progress tracking and insights
Features
Read full description

Water fasting and intermittent fasting, made clear — and no longer something you do alone. Start a fast with one tap and watch the live countdown on your Lock Screen, in the Dynamic Island and on your Home Screen widget. Follow what your body is doing hour by hour — fat burning, ketosis, cellular regeneration — based on published research. FAST TOGETHER — ANONYMOUS BY DESIGN • Live: see how many people are fasting with you right now • Your Circle: add friends with a simple code, follow their fast live, send boosts and friendly nudges • Groups & challenges: chase one goal together — from a 16:8 streak to a 7-day reset • No profiles, no photos, no feed of strangers. You appear under a generated water name unless you choose otherwise. YOU DECIDE WHO SEES YOU Share everything, hide from one specific friend, or go invisible completely. One tap, any time. NEVER LOSE YOUR PROGRESS Link Apple or Google and restore your history, stats and circle on any device. PICK YOUR PROTOCOL • Intermittent: 12:12, 14:10, 16:8, 18:6, 20:4 and OMAD • Water fasting: 24h, 36h, 48h, 72h, 4, 5 and 7 days • Flex: set or move your finish time while the fast is running ALSO INSIDE • Live Activity, Lock Screen and Home Screen widgets • Apple Health: steps, sleep, heart rate, weight and water • Hydration and electrolyte guidance during longer fasts • Streaks, trends and your full weight history • Personal insights and reminders you stay in control of Waterfaster is not medical advice. Talk to your doctor before longer fasts, and never fast on medication without medical guidance. — Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://waterfaster.app/terms Privacy Policy: https://waterfaster.app/privacy

About

Fasting Center

Track intermittent and extended fasting with a visual timer and detailed insights into your body's stages. Log various health metrics, view patterns, and utilize helpful calculators for weight and calorie projections. Integrates with Apple Health and offers extensive language support.

Highlights
  • Customizable fasting plans
  • Live fasting progress ring
  • 17 fasting stages explained
  • Comprehensive health metric logging
  • Fasting calendar and trend charts
  • Weight and calorie projection calculators
  • Apple Health integration
Features
Read full description

Fasting Center is a fasting timer and tracker for intermittent and extended fasting. Start a fast, watch the ring fill, see which stage your body is in, and keep your numbers in one place. Fast your way - Plans from 12:12 to 23:1 (OMAD), extended fasts of 24, 36, 48 and 72 hours, an open fast with no end, or a specific end time - A live ring that shows time elapsed, time left or percent. Tap the ring to switch - Change the start or end time whenever you need to - Milestone notifications and a reminder before your fast ends - A celebration when you finish, with your mood, a note and a picture of your fast to share Know what is happening - 17 fasting stages, from digestion to refeeding, and what each one means - Tips that make fasting easier - The scientific sources behind the stages and the calculators Log what matters - Weight, body fat, waist, ketones, blood glucose and blood pressure - Energy, hunger, motivation and anxiety on a scale of 1 to 10 - Calories, water, sodium, potassium and magnesium - Daily notes, and past fasts you add by hand - Apple Health - read weight, body fat, steps, heart rate and glucose, and write weight and body fat back See your patterns - A fasting calendar, charts of your fasting hours, recent fasts and streaks - Trends for your measurements and how you feel, and your BMI - Patterns found in your own data, such as when you feel hungriest Calculators - Extended fasting - estimate the weight you lose in a fast of 1 to 40 days, split into fat, protein, water and gut contents, with a refeeding guide - Intermittent fasting and calorie deficit - set a goal weight or daily calories and see a day-by-day projection Everywhere you look - Home screen widgets, a Live Activity on the Lock Screen and in the Dynamic Island, and an Apple Watch app with complications - Dark mode, accent colors, and pounds, kilograms or stones - Sixteen languages: English, Spanish, German, French, Portuguese, Italian, Polish, Turkish, Ukrainian, Russian, Japanese, Korean, Arabic, Indonesian, Urdu and Bengali - Import fasts from Easy Fast or Zero, and export your data to Excel - Use it without an account, or sign in with email, Google or Apple to sync between your devices Important Fasting Center is for general wellness and education. It is not medical advice. Extended fasting is not right for everyone, especially if you are pregnant, breastfeeding, under 18, underweight, or have a medical condition such as diabetes or a history of eating disorders. Talk to your doctor before you start. Weight and body composition projections are estimates, not predictions.

Screenshots

Waterfaster4 screens
Fasting Center4 screens

Verdict

The call

The clearest difference is in-app purchases: Fasting Center at none against Waterfaster's 3. Fasting Center also leads on update cadence (every 3 days vs every 11 days) and ratings volume (26 vs 2). Waterfaster's advantage is rating (5.0 vs 4.8). On price, ads and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Waterfaster sells 3 in-app purchases, starting at $3.99 per 7 days. Fasting Center asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Waterfaster holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Fasting Center has 26 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Waterfaster ships an update every 11 days, Fasting Center every 3 days. Both last shipped on October 31, 2026.

Scorecard6 real differences · 4 level
Waterfaster versus Fasting Center: the parameters behind the verdict, then further details
ParameterWaterfasterFasting Center
PriceFreeFree
Rating5.0 (2 ratings) — better4.8 (26 ratings)
Positive reviews—100.0% of reviews
Number of ratings226 — better
Update frequencyEvery 11 daysEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhoneiPhone, iPad, iPod, Apple Watch — better
Requires iOS16.415.0 — better
Further details — not scored
Size59 MB50 MB
Age rating17+12+
DeveloperAMIT SolutionsAndrey Titov

In-app purchases

3 purchases

Waterfaster

Subscriptions2
  • Waterfaster+$3.997 Days
  • Waterfaster+7 Days trial$44.991 Year
One-time1
  • Lifetime$89.99
None

Fasting Center

No in-app purchases

Questions

Is Waterfaster free?
Waterfaster is free to download, with in-app purchases available.
Is Fasting Center free?
Fasting Center is free to download, with no in-app purchases.
Which has better reviews, Waterfaster or Fasting Center?
Waterfaster is rated higher. Waterfaster averages 5.0 out of 5 from 2 ratings, while Fasting Center averages 4.8 from 26 ratings.
Do Waterfaster or Fasting Center have ads?
Neither Waterfaster nor Fasting Center shows ads.
Which is updated more often, Waterfaster or Fasting Center?
Waterfaster ships an update every 11 days, and Fasting Center every 3 days. Most recently, Waterfaster was updated on October 31, 2026 and Fasting Center on October 31, 2026.

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