Comparison

Simple Fasting App 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

Simple Fasting App

This app simplifies intermittent fasting with a focus on privacy and ease of use. It offers popular fasting schedules, progress tracking, and smart notifications without ads, subscriptions, or data collection.

Highlights
  • Free and private
  • Popular fasting schedules
  • Progress tracking
  • Smart notifications
  • Intuitive design
  • Customizable themes
  • Quick start
Features
Read full description

Track intermittent fasting with a clear timer, flexible plans and a history you can return to. Simple Fasting App is free to use, with every feature included and no ads or subscriptions. Start without creating an account. A PLAN THAT FITS YOUR DAY Choose 12:12, 16:8, 18:6, 20:4 or a 24-hour fast, or set your own duration. Adjust the start time if you forgot to start the timer. Finish whenever you need to; reaching your target does not automatically end your fast. YOUR PROGRESS AT A GLANCE See elapsed time, time remaining and your planned finish time. Set an optional completion reminder. Follow your fast with Home Screen widgets, Live Activities and Dynamic Island on supported iPhones. APPLE WATCH AND SIRI Start and finish a fast from your Apple Watch. Your session syncs with your paired iPhone when connectivity is available. Tap the watch dial to open its controls. Use Siri and Shortcuts to manage your fast, ask about time and history, or change the timer display. You can also choose your next plan through a shortcut while your current fast continues. Siri availability depends on language, device and system settings. A HISTORY THAT MAKES SENSE Review completed fasts, average duration, your longest fast and weekly or monthly patterns. Open a day to see its sessions and timeline. Use the roomier iPad layout in portrait or landscape. LEARN AS YOU GO Explore illustrated fasting-stage guides with source links. The stages are general estimates based on elapsed time, not measurements of your metabolism or guarantees of a health result. PRIVATE AND PERSONAL Your fasting records are stored locally on your devices. The app does not collect or sell your fasting data. Paired iPhone–Watch syncing and optional Siri features use Apple system services; details are in the privacy policy. Choose light or dark appearance and your preferred accent color. Available in English, Turkish, German and Spanish. Simple Fasting App is a personal tracking tool and does not provide medical advice. Choose your plan and start when you are ready.

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

Simple Fasting App4 screens
H2 flow water fasting4 screens

Verdict

The call

The clearest difference is rating: Simple Fasting App at 4.5 against H2 flow water fasting's 3.4. Simple Fasting App also leads on in-app purchases (none vs 2) and review sentiment (77% vs 50%). On price, update cadence, ads and monetization model 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. H2 flow water fasting sells 2 in-app purchases, starting at $2.99 per month. Simple Fasting App asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Simple Fasting App holds the better App Store score, 4.5 against 3.4. That said, the two scores are not equally well evidenced: Simple Fasting App has 47 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 77% of Simple Fasting App's written reviews are positive against 50% of H2 flow water fasting's.

UpkeepUpdate frequency

Simple Fasting App ships an update every 6 weeks, H2 flow water fasting monthly. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
Simple Fasting App versus H2 flow water fasting: the parameters behind the verdict, then further details
ParameterSimple Fasting AppH2 flow water fasting
PriceFreeFree
Rating4.5 (47 ratings) — better3.4 (5 ratings)
Positive reviews76.9% of reviews — better50.0% of reviews
Number of ratings47 — better5
Update frequencyEvery 6 weeksMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS17.616.4 — better
Further details — not scored
Size6 MB57 MB
Age rating4+17+
DeveloperMehmet Emrah KonyaMartijn Nelissen

Customer experience

Simple Fasting App

All ratings38 ratings
Positive81.6%
Neutral10.5%
Negative7.9%
Written reviews13 reviews
Positive76.9%
Neutral23.1%
Negative0.0%

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

None

Simple Fasting App

No in-app purchases

2 purchases

H2 flow water fasting

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

Questions

Is Simple Fasting App free?
Simple Fasting App is free to download, with no in-app purchases.
Is H2 flow water fasting free?
H2 flow water fasting is free to download, with in-app purchases available.
Which has better reviews, Simple Fasting App or H2 flow water fasting?
Simple Fasting App is rated higher. Simple Fasting App averages 4.5 out of 5 from 47 ratings, while H2 flow water fasting averages 3.4 from 5 ratings.
Do Simple Fasting App or H2 flow water fasting have ads?
Neither Simple Fasting App nor H2 flow water fasting shows ads.
Which is updated more often, Simple Fasting App or H2 flow water fasting?
Simple Fasting App ships an update every 6 weeks, and H2 flow water fasting monthly. Most recently, Simple Fasting App was updated on October 30, 2026 and H2 flow water fasting on October 24, 2026.

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