Comparison

ZenFast vs Fasting Clock

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

Head to head
About

ZenFast

Track your intermittent fasting journey with a simple and elegant interface. Visualize your progress with a smart timer, choose from flexible plans, and monitor your history to stay motivated. Designed for privacy and ease of use.

Highlights
  • Smart fasting timer with progress ring
  • Flexible fasting plans (presets and custom)
  • Detailed history and streak tracking
  • Home screen widgets
  • Private and secure local data storage
  • Motivational quotes
  • Dark mode support
Features
Read full description

Achieve your health goals with ZenFast, the simplest and most elegant way to track your intermittent fasting journey. Whether you are a beginner or a seasoned faster, ZenFast provides the tools you need to stay consistent without the clutter. Designed with privacy and simplicity in mind, it helps you focus on what matters most: your progress. Key Features: * Smart Fasting Timer: Visualize your fast with a beautiful, intuitive circular progress ring. See your elapsed time and remaining time at a glance. * Flexible Fasting Plans: Choose from popular presets like 16:8, 18:6, 20:4, 14:10, 12:12, and OMAD (23:1), or create your own Custom schedule that fits your lifestyle. * Detailed History: Track your success with a built-in calendar view. Monitor your daily sessions, weekly averages, and longest streaks to stay motivated. * Home Screen Widgets: Keep an eye on your timer without even opening the app. * Private & Secure: Your data belongs to you. Fasting sessions are stored locally on your device and securely synced via your private iCloud. No accounts, no tracking, and no data selling. * Stay Motivated: Enjoy dynamic motivational quotes to keep you inspired during your fast. * Dark Mode Support: A stunning interface that looks great in both light and dark modes. Completely free to use. Download ZenFast today and take control of your health! Privacy Policy: https://terefe.us/#/privacy/zenfast/privacy

About

Fasting Clock

Features
Read full description

Simple Fasting Clock is a clean, easy intermittent fasting timer that helps you stay consistent—without complicated setup. Start your fast, watch the progress ring, and see exactly how much time is left. During your fast, you’ll also get simple fasting phase insights (Fed → Fat Burning → Deep Ketosis) to stay motivated. FEATURES • One-tap fasting timer with auto-complete • Presets: 16:8, 18:6, 20:4 (Warrior), 23:1 (OMAD) • Custom fasting duration from 1 to 72 hours • Live progress ring with time left and percentage • Fasting phase guide with clear explanations • History log for every fast (completed or ended early) • Stats: completed fasts, total hours fasted, average duration, and day streak • Achievements to celebrate milestones • Daily quote + daily tip for motivation • Designed for iPhone and iPad • No account required DISCLAIMER This app is for informational purposes only and is not medical advice. If you have a medical condition, are pregnant, or are under 18, consult a healthcare professional before fasting. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

ZenFast4 screens
Fasting Clock4 screens

Verdict

The call

The clearest difference is in-app purchases: ZenFast at none against Fasting Clock's 3. ZenFast also leads on ads (none vs shown). Fasting Clock's advantage is iOS requirement (13.0 vs 17.6). On price and device support 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 Clock sells 3 in-app purchases, starting at $0.99 per 7 days. ZenFast asks for nothing beyond the download.

Scorecard3 real differences · 6 level
ZenFast versus Fasting Clock: the parameters behind the verdict, then further details
ParameterZenFastFasting Clock
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequency—Every 5 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.613.0 — better
Further details — not scored
Size2 MB23 MB
Age rating4+4+
DeveloperCAPITAL GETAHUN TEREFEAfriwan Ahda

In-app purchases

None

ZenFast

No in-app purchases

3 purchases

Fasting Clock

Subscriptions3
  • Weekly Premium Access$0.997 Days
  • Monthly Premium Access$2.991 Month
  • Yearly Premium Access$17.991 Year

Questions

Is ZenFast free?
ZenFast is free to download, with no in-app purchases.
Is Fasting Clock free?
Fasting Clock is free to download, with in-app purchases available.
Do ZenFast or Fasting Clock have ads?
Fasting Clock shows ads; ZenFast does not.

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