Comparison

Fasting Tracker vs H2 flow water fasting

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

Head to head
About

Fasting Tracker

This app helps you track intermittent fasting with a live timer and preset plans like 16:8. It shows your progress, weight trends, and offers notifications to keep you on track. Unlock advanced insights and features with a premium subscription.

Highlights
  • Live intermittent fasting timer
  • Preset and custom fasting plans
  • Fasting zone explanations
  • Progress tracking and stats
  • Weight logging and goal setting
  • Achievements and streaks
  • Apple Watch integration
Features
Read full description

FastRight is a clear, focused intermittent fasting tracker. Start a fast in seconds, watch the live timer move through each fasting zone, and see your weight trend toward your goal. Whether you follow 16:8, 18:6, 20:4 or one meal a day, FastRight keeps your fasting routine simple and your progress easy to see. FAST YOUR WAY Pick a plan that fits your day: Circadian Rhythm (13h), 16:8, 18:6, 20:4 or OMAD (23:1). With Premium, set any custom duration, from a few hours to multi-day fasts. KNOW WHAT YOUR BODY IS DOING The timer shows which fasting zone you are in right now: Anabolic, Catabolic, Fat Burning, Ketosis and Deep Ketosis. Short explanations tell you what each phase means. STAY ON TRACK Get a notification when you are halfway, when one hour is left, when you enter a new zone and when you reach your goal. Build a fasting streak, check in daily and unlock 20 achievements along the way. SEE YOUR PROGRESS Your stats show total fasts, total fasting time, average and longest fast. Browse every fast in your history and on the calendar. TRACK YOUR WEIGHT Log your weight in lb or kg, set a goal weight and follow your current weight, 30-day trend and the estimated time to reach your goal. GO DEEPER WITH PREMIUM Unlock advanced insights: streaks and consistency, your preferred plan, success rate, best start time, weekday vs. weekend patterns and month-to-month comparisons. Add the weight chart, edit any past log, and back up or move your data with export and import. ON YOUR WRIST Follow your active fast on Apple Watch: elapsed time, target, progress and current zone, and end your fast right from your wrist. Light and dark mode are both supported. Start your next fast today and let FastRight keep the count. FREE FEATURES • Fasting timer with a live progress ring • Preset plans: Circadian, 16:8, 18:6, 20:4 and OMAD • Fasting zones with simple explanations • Halfway, one-hour-left, zone and goal notifications • Fasting stats: total, average and longest fast • Fasting history and calendar • Weight log with goal, trend and time-to-goal estimate • Fasting streaks, daily check-in and 20 achievements • Apple Watch app to follow and end your fast PREMIUM FEATURES • Custom fasting durations, including multi-day fasts • Personalized insights: streaks, consistency and patterns • Monthly progress and month-to-month comparisons • Weight chart to see your progress over time • Edit any previous fasting or weight log • Export and import your data • No ads Privacy Policy: https://www.metko.org/fastright/privacy.html Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

H2 flow water fasting

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.

Highlights
  • Hydration tracking
  • Mindful guidance
  • Science-based tools
  • Fasting preparation
  • Milestone celebration
  • Metabolic renewal support
Read full description

Unlock the full potential of water fasting with H₂flow — designed with insights from experienced fasting practitioners to help you prepare, stay mindful, and celebrate every milestone. Whether you’re completing your first 24-hour fast or optimizing multi-day protocols, H₂flow supports your journey with hydration tracking, mindful guidance, and science-based tools for metabolic renewal. Important Disclaimer: H₂flow is intended for informational and wellness purposes only. It does not provide medical advice and is not a substitute for professional medical consultation, diagnosis, or treatment. Always seek the advice of your physician or another qualified healthcare provider before starting any fasting program, making dietary changes, or making decisions related to your health. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Fasting Tracker4 screens
H2 flow water fasting4 screens

Verdict

The call

The clearest difference is rating: Fasting Tracker at 4.7 against H2 flow water fasting's 3.4. Fasting Tracker also leads on update cadence (every 3 days vs monthly) and ratings volume (428 vs 5). H2 flow water fasting's advantage is ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, in-app purchases, device support 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. Fasting Tracker sells 4 in-app purchases, starting at $6.99 per 7 days and H2 flow water fasting sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Fasting Tracker holds the better App Store score, 4.7 against 3.4. That said, the two scores are not equally well evidenced: Fasting Tracker has 428 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 61% of Fasting Tracker's written reviews are positive against 50% of H2 flow water fasting's.

UpkeepUpdate frequency

Fasting Tracker ships an update every 3 days, H2 flow water fasting monthly. Both last shipped on October 30, 2026.

Scorecard6 real differences · 4 level
Fasting Tracker versus H2 flow water fasting: the parameters behind the verdict, then further details
ParameterFasting TrackerH2 flow water fasting
PriceFreeFree
Rating4.7 (428 ratings) — better3.4 (5 ratings)
Positive reviews60.9% of reviews — better50.0% of reviews
Number of ratings428 — better5
Update frequencyEvery 3 days — betterMonthly
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS17.016.4 — better
Further details — not scored
Size48 MB57 MB
Age rating4+17+
DeveloperMETKO LABS BILISIM ITHALAT VE IHRACAT TICARET LIMITED SIRKETIMartijn Nelissen

Customer experience

Fasting Tracker

All ratings428 ratings
Positive91.1%
Neutral5.1%
Negative3.7%
Written reviews23 reviews
Positive60.9%
Neutral13.0%
Negative26.1%

H2 flow water fasting

All ratings4 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

4 purchases

Fasting Tracker

Subscriptions4
  • Intermittent Fasting Tracker$6.997 Days
  • Intermittent Fasting Tracker$14.991 Month
  • Intermittent Fasting Tracker$29.991 Year
Show 1 more
  • Intermittent Fasting Tracker$39.991 Year
2 purchases

H2 flow water fasting

Subscriptions2
  • H2Flow Pro Monthly$2.991 Month
  • H2Flow Pro Yearly$24.991 Year

Questions

Is Fasting Tracker free?
Fasting Tracker is free to download, with in-app purchases available.
Is H2 flow water fasting free?
H2 flow water fasting is free to download, with in-app purchases available.
Which has better reviews, Fasting Tracker or H2 flow water fasting?
Fasting Tracker is rated higher. Fasting Tracker averages 4.7 out of 5 from 428 ratings, while H2 flow water fasting averages 3.4 from 5 ratings.
Do Fasting Tracker or H2 flow water fasting have ads?
Fasting Tracker shows ads; H2 flow water fasting does not.
Which is updated more often, Fasting Tracker or H2 flow water fasting?
Fasting Tracker ships an update every 3 days, and H2 flow water fasting monthly. Most recently, Fasting Tracker was updated on October 30, 2026 and H2 flow water fasting on October 30, 2026.

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