DoFast vs FastFast
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
DoFast
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Smart intermittent fasting tracker. Choose 16:8, 18:6, 20:4, OMAD or custom protocols. - Multiple fasting protocols - Metabolic phase tracking - Timer with eating window - Calendar heatmap - Statistics and streaks - Dark mode - English and Hebrew Not medical advice. Consult your doctor. Use at your own risk.
FastFast
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FastFast - Fasting, Food & Steps Track calories, fast smarter, and hit your step goals - without ever opening the app. FastFast turns your three healthiest habits into one beautifully simple experience. No bloat. Just the tools you'll actually use, right where you'll see them: your Home Screen. YOUR HOME SCREEN, YOUR COACH Widgets are the whole idea. Pin your fasting timer, calorie ring, or daily step progress wherever you'll glance One tap to log a meal. One tap to scan a plate. One tap to check the timer. The fewer times you open the app, the better it's working. EVERYTHING YOU NEED. FREE. Calorie Tracking - log meals in seconds with a clean, fast form AI Food Scanner - snap a photo and let Apple Intelligence estimate the calories for you* 16:8 Fasting Timer - a beautiful ring that shows exactly where you are in your eating window Step Tracking - syncs with Apple Health and celebrates every milestone Gentle Reminders - get notified when your eating window opens and closes Calendar History - scroll back through any day, see your streaks build BUILT FOR iOS, BUILT FOR YOU Private by design - your data stays on your device Apple Health integration - your steps, automatically THE CATCH? THERE ISN'T ONE. The core experience - fasting, calorie logging, step tracking, widgets, reminders - is completely free. We mean it. Download FastFast. Build the habits. Watch them stick. *AI food scanning requires a device that supports Apple Intelligence on iOS 26 or later.
Screenshots
Verdict
The clearest difference is iOS requirement: DoFast at 15.0 against FastFast's 26.0. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | DoFast | FastFast |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | โ |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPad |
| Requires iOS | 15.0 โ better | 26.0 |
| Further details โ not scored | ||
| Size | 8 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Igor Lenderman | Parsa Nasirimehr |
In-app purchases
DoFast
No in-app purchases
FastFast
No in-app purchases








