Plan extended fasts with personalized projections. Input your body stats and desired duration to estimate weight change, fat loss, and energy use. This data-driven tool provides a clear starting point for your fasting journey.






250+ iOS apps curated and reviewed
Looking for free free fasting calculator apps? 20 of our 250+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | 4.6★ (10) | No | No | Sep 2026 | ||
| 2 | Free | 4.6★ (12K) | No | No | Sep 2026 | ||
| 3 | Free | 4.8★ (445K) | No | Yes | Sep 2026 | ||
| 4 | Free | 4.8★ (246K) | No | Yes | Sep 2026 | ||
| 5 | Free | 4.6★ (79K) | No | Yes | Sep 2026 | ||
| 6 | Free | 4.9★ (51K) | No | Yes | Sep 2026 | ||
| 7 | Free | 4.7★ (5.6K) | No | Yes | Sep 2026 | ||
| 8 | Free | — | No | No | May 2026 |






Plan extended fasts with personalized projections. Input your body stats and desired duration to estimate weight change, fat loss, and energy use. This data-driven tool provides a clear starting point for your fasting journey.



Easily manage your intermittent fasting schedule with this simple timer. Track your fasting and meal times, explore various fasting methods, and discover trends in your progress. Maintain a healthy lifestyle with a user-friendly interface.






This app tracks intermittent fasting and nutrition to help users achieve real body composition changes. It integrates fasting, protein intake, meals, hydration, and habits for a holistic approach to weight loss and metabolic health.