FastZen: Fasting & Autophagy
16:8, OMAD & Eating Window
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
FastZen makes intermittent fasting simple, calm, and easy to stick with. Whether your goal is weight loss, more energy, or better focus, and whether you follow 16:8, 18:6, 20:4, OMAD, or your own custom eating window, FastZen guides you through every fast with a beautiful timer and gentle, science-based insights.
Watch your fasting ring fill in real time, see exactly which metabolic phase your body is in, and learn what's happening inside — from fat burning to ketosis and autophagy. No noise, no guilt. Just clear progress.
WHY FASTZEN
• Beautiful fasting timer with a live progress ring
• Preset plans: 16:8, 18:6, 20:4, 23:1 (OMAD) — or set your own hours
• Real-time body phases: anabolic, fat burning, ketosis, deep ketosis, autophagy
• Live Activity & Dynamic Island so your fast is always one glance away
• Home Screen widgets and full Apple Watch app
TRACK WHAT MATTERS
• Weight logging with BMI and long-term trend charts
• Water & hydration tracking, synced with Apple Health
• Streaks, average fast length, and progress stats
• Full fasting history at a glance
DESIGNED TO FEEL GOOD
• Warm, minimal design that's calm to use every day
• Smart reminders to start and end your fast
• Share your progress with friends
FastZen Pro unlocks advanced stats, weight tracking, and more to support your journey.
Start your first fast today and feel the difference.
Note: FastZen is for educational and wellness purposes only and is not medical advice. Consult a healthcare professional before changing your diet or fasting routine.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Choose the way you want to stay consistent: FastZen now offers lifetime access alongside monthly and yearly plans, with clearer pricing and checkout details. We’ve also added trusted health references from the CDC, PubMed, and the Nobel Prize to the fasting body-phase and BMI guides, so you can explore the information behind your progress. Plus, we refined the paywall and account links for a smoother, more transparent experience while tracking fasts, hydration, weight, and routines. Keep building your healthy routine with more confidence.
The developer, 培 李, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 培 李
- Size
- 23.5 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
English and 29 more
- English, Arabic, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Lifetime $49.99
- Pro Yearly $19.99
- Pro Monthly $3.99
- Copyright
- © 2026 Perry Lee