Download Fastive — free intermittent fasting app
Track fasting windows, follow metabolic phases, log water and weight, and stay consistent with streaks and reminders. Fastive works on iPhone, iPad, and Android — free to install, with optional Premium for advanced plans.
Free download · No credit card required · iOS 16.4+ & Android 8.0+
What you get when you download Fastive
Fasting timer & phases
Start and end fasts, see eating vs fasting countdowns, and follow an educational metabolic timeline from fed state through autophagy.
Plans for every level
Free plans include 12:12, 14:10, 16:8, and 18:6. Premium unlocks 20:4, OMAD, and 5:2. Compare plans.
Daily logging
Water tracker with goals, weight history, meal notes, and one AI meal photo scan per day to estimate macros.
Apple Health & Health Connect
Sync weight and activity where supported. iOS users get Live Activity on the Lock Screen during an active fast.
Streaks & progress
Completed fasts feed history, stats, and streaks so you can see consistency over weeks and months.
Works offline
Core timer and logging work without a connection. Optional features may need network access.
See the full feature list on our Features page.
iOS vs Android
| Capability | iPhone / iPad | Android |
|---|---|---|
| Fasting timer & metabolic phases | ✓ | ✓ |
| Water & weight tracking | ✓ | ✓ |
| AI meal scan (1/day) | ✓ | ✓ |
| Apple Health sync | ✓ | — |
| Health Connect sync | — | ✓ |
| Live Activity (Lock Screen) | ✓ | — |
| Push reminders | ✓ | ✓ |
| Languages (9) | ✓ | ✓ |
How to install
On iPhone or iPad
- Tap the App Store badge at the top of this page.
- Install Fastive from the App Store listing.
- Open the app and choose a fasting plan (16:8 is a popular starting point).
- Allow notifications for eating-window reminders if you want them.
- Optionally connect Apple Health for weight and activity sync.
On Android
- Tap the Google Play badge at the top of this page.
- Install from Google Play (package app.siafy.fastive).
- Pick a plan and start your first fast or schedule your eating window.
- Enable notifications for reminders during your fasting routine.
- Grant Health Connect permissions if you use connected health apps.
System requirements
iOS
- iOS 16.4 or later
- iPhone; iPad supported
- Live Activity requires compatible iPhone model and iOS version
- Apple Health optional; requires Health permissions
Android
- Android 8.0+ (API level 26)
- Health Connect optional on supported devices
- Camera access for AI meal photo analysis (optional)
Free vs Premium
Downloading Fastive is free. The free tier includes core fasting plans, timer, phases, logging, and daily AI meal scan. Fastive Premium adds advanced plans (20:4, OMAD, 5:2), activity heat map, and achievement badges. Subscriptions are billed through the App Store or Google Play — cancel anytime.
Download FAQ
More questions? Browse the full FAQ or contact support.