Comparison

Fastology vs Water Fasting

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

Head to head
About

Fastology

This app provides structured tracking for intermittent fasting, going beyond simple timers. It helps users follow specific fasting schedules with clear phase progress, build consistency through streaks, and manage a flexible weekly plan. Focuses on discipline and reducing guesswork for a clearer fasting experience.

Highlights
  • Track various fast types (16:8, OMAD, extended)
  • Live phase-by-phase progress tracking
  • Build streaks from completed fasts
  • Flexible weekly fasting schedule
  • Review fasting history
  • Ask fasting questions with reviewed answers
  • Siri and Shortcuts integration
Features
Read full description

Fastology is a fasting tracker for people who want more than a timer. Fasting works when it is structured. Fastology helps you track 16:8, 18:6, OMAD, and extended fasts with clear phase progress, streaks that reflect completed fasts, and a weekly schedule that fits real life. Most fasting apps count hours. Fastology helps you follow through. WHY FASTOLOGY Structured, not reactive Follow a clear fasting rhythm instead of making it up as you go. See where you are Track each phase of the fast with live progress, so you always know where you stand and what comes next. Consistency over intensity Build streaks from completed fasts and focus on repeatability, not random extremes. Flexible weekly schedule Set your fasting rhythm for the week, then adjust specific days when life changes. Clear, focused experience No clutter. No noise. Just the tools that matter when you want to fast with more discipline and less guesswork. WHAT YOU CAN DO • Track 16:8, 18:6, OMAD, and extended fasts • Follow live phase-by-phase progress • Build streaks from completed fasts • Set a weekly schedule and adjust specific days • Review your fasting history over time • Ask fasting questions with reviewed answers and linked sources • Start a fast, check your phase, or search Fastology from Siri, Spotlight, Shortcuts, and Ask • On supported devices, use Apple Intelligence to explore your fasting history Fastology is built for people who want to fast with more clarity, more structure, and more follow-through.

About

Water Fasting

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.

Highlights
  • Living water orb timer with gyroscope physics
  • Six science-backed fasting stages
  • Hydration and wellness logging
  • Personalized wellness insights
  • Premium minimalist design
  • Data export
Features
Read full description

Watch a living water orb fill as you fast. Real gyroscope physics make it slosh when you tilt your phone. Track six science backed fasting stages, log hydration, and understand what your body is doing during every hour of your fast. A Living Water Orb Timer A stunning glass orb fills with water as you fast. Real time gyroscope physics make the water slosh when you tilt your phone. Rising bubbles and fluid motion make your fast feel tangible and alive. Six Science Backed Fasting Stages From Fed State to Deep Ketosis, understand what happens in your body at every phase. All content is peer reviewed and source cited. No blogs, no hype, just science. Smart Wellness Tracking Log your water intake, check in on your energy, mood, and focus. Get personalized wellness insights that connect your hydration with how you feel. The app recommends when to drink water, rest, or adjust based on your check in scores. Beautiful Premium Design Deep ocean inspired dark theme with Apple style glass UI elements. Every screen is crafted with premium minimalism, clean typography, fluid animations, and thoughtful interactions. Free Features Basic fasting timer with water orb Water logging with 250 ml quick add Fed State information 16 to 8 and 24 hour fasting routines Pro Features Seven day free trial for all Pro features, then 59.99 USD per year Monthly option available at 9.99 USD per month All six fasting stages explained Full water tracking with custom goals Wellness check in and smart insights All routines including 36 hour, 48 hour, and 72 hour fasts Adjust start and end time Pause and resume fasting Peer reviewed educational library Safe refeeding protocols Smart notifications and reminders Export your data Your Privacy Matters Your fasting data, water logs, mood scores, and journal entries stay on your device. We never transmit health data. Anonymous opt out usage analytics, limited to event names only and without health values, help us improve the app. Sign in with Apple is optional. Local first by design. Medical Disclaimer This app is for general wellness and educational purposes only. Always consult a healthcare professional before fasting. Start your mindful fasting journey today.

Screenshots

Fastology4 screens
Water Fasting3 screens

Verdict

The call

The clearest difference is in-app purchases: Fastology at none against Water Fasting's 2. Fastology also leads on ratings volume (10 vs 2). On price, rating, update cadence and ads 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. Water Fasting sells 2 in-app purchases, starting at $9.99 per month. Fastology asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Fastology against 5.0 for Water Fasting. That said, the two scores are not equally well evidenced: Fastology has 10 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 26, 2026 and August 31, 2026 respectively.

Scorecard3 real differences · 7 level
Fastology versus Water Fasting: the parameters behind the verdict, then further details
ParameterFastologyWater Fasting
PriceFreeFree
Rating4.9 (10 ratings)5.0 (2 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings10 — better2
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS17.0 — better18.0
Further details — not scored
Size40 MB19 MB
Age rating4+12+
DeveloperSmallScale Works LLCSUKRU DEMIR

In-app purchases

None

Fastology

No in-app purchases

2 purchases

Water Fasting

Subscriptions2
  • Water Fasting Pro$9.991 Month
  • Water Fasting Pro1 Year trial$59.991 Year

Questions

Is Fastology free?
Fastology is free to download, with no in-app purchases.
Is Water Fasting free?
Water Fasting is free to download, with in-app purchases available.
Which has better reviews, Fastology or Water Fasting?
Water Fasting is rated higher. Fastology averages 4.9 out of 5 from 10 ratings, while Water Fasting averages 5.0 from 2 ratings.
Do Fastology or Water Fasting have ads?
Neither Fastology nor Water Fasting shows ads.
Which is updated more often, Fastology or Water Fasting?
Fastology ships an update every 3 weeks, and Water Fasting every 3 weeks. Most recently, Fastology was updated on September 26, 2026 and Water Fasting on August 31, 2026.

Other comparisons