BodyFast offers guided fasting plans and a coach, but the full experience needs a paid plan and an account. If you'd rather have a simple fasting timer that's free to fast with and asks for nothing, IF24 is an easy alternative. IF24 Pro is an optional one-time purchase for advanced extras; nothing you need to run a fast is behind it.
IF24 vs BodyFast at a glance
| IF24 | BodyFast | |
|---|---|---|
| Price | Free; IF24 Pro optional (one-time, no subscription) | Freemium + paid plan / coach |
| Account required | No | Sign-up for the full experience |
| Data collected | None (App Store: “Data Not Collected”) | See its App Store privacy label |
| Metabolic phase estimates (fat burning, ketosis, autophagy) | Yes, free | Limited; focus on guided plans |
| Schedules | 14:10, 16:8, 18:6, 20:4 free; custom length with Pro | Coach-assigned plans + presets |
| Platform | iPhone (iOS) | iOS, Android |
Why pick IF24
If you don't want a coach or a paid plan and just need a free, private timer that shows estimated fat burning, ketosis and autophagy phases based on typical timing, IF24 fits. BodyFast makes sense if you want structured, guided plans and don't mind paying.
IF24 is free to download; IF24 Pro is an optional one-time purchase for advanced extras. Comparison last updated August 2026 and based on publicly available information; competitor features and pricing may change — check the respective app's official page for the latest. BodyFast is a trademark of its owner, used here only to identify the app for comparison. IF24 is an independent app and is not affiliated with or endorsed by BodyFast. Metabolic phases shown by IF24 are estimates based on typical fasting timing, not measurements, and are not medical advice.