StayFasted - Fasting Tracker
AI Fasting Coach & Tracker
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
A calmer way to fast. A timer, an hour-by-hour guide, and a check-in that answers back when it gets hard. Now on Apple Watch. No account.
StayFasted is the fasting app that actually keeps you going.
Most fasts don't end because of the plan. They end in one hard half hour. StayFasted is built around that half hour: a timer you can trust, a guide to what to expect, and a check-in that answers back.
A TIMER FOR EVERY FAST
16:8 · 18:6 · 20:4 · One Meal a Day · 36h · 48h · 72h. One button starts it. Forgot to start? Move the start time in seconds. Your fast also shows on your Lock Screen, in the Dynamic Island, in widgets and on Apple Watch.
KNOW WHAT TO EXPECT, HOUR BY HOUR
For each part of a fast: what is generally understood, what people often feel, and what tends to help. Timing differs from person to person. General information, not medical advice.
CHECK IN WHEN IT GETS HARD
Mood, hunger and energy in a few taps. With Pro, an AI replies to what you wrote, how you feel and why you started. It runs on your iPhone, and it never pushes you to carry on.
BREATHE
Short breathing sessions for the moment a craving arrives, and a guided deep rest for when you need to lie down for ten minutes. On your phone and on your wrist.
FLUIDS AND ELECTROLYTES
Log water, coffee and tea in one tap. See whether you are keeping an even pace through the day. Electrolyte reminders for longer fasts.
END IT WELL
Stop whenever you choose. A refeed guide walks you back to food gently, from liquids to normal meals.
SEE YOUR PATTERNS
Insights in plain words from your own data, always honest about how much data they are based on. Progress photos on a timeline. A monthly report you can share with your doctor or coach.
APPLE WATCH
See your fast, start or end it, log water, check in and breathe.
APPLE HEALTH
Optional. Reads weight, steps, sleep, resting heart rate and active energy. Saves weight, water and mindful minutes. You choose what to share.
YOUR FASTING DATA STAYS ON YOUR PHONE
No account and no sign-up. Your fasts, check-ins, photos and notes are stored on your iPhone. Three optional features use the internet, only if you turn them on: weather, scanning a drink's barcode, and Apple Music playlists.
FREE
- Timer for every fasting length
- The hour-by-hour guide
- Check-ins, fluid tracking and the refeed guide
- Two breathing sessions
- Apple Watch, widgets and Live Activities
- Your last 10 fasts and 7 days of charts
PRO
- AI replies on every check-in
- All breathing sessions and deep rest
- Full analytics and a monthly report with PDF
- Unlimited history, journal, measurements and supplements
- Rhythm planner, drink scanner, photo comparison
- Health Labs scanner for InBody, DEXA and blood panels
- CSV export
Pro: $5.99 a month or $39.99 a year. Lifetime: $49.99, one payment.
StayFasted gives general information about fasting and is not medical advice. Talk to your doctor before you start fasting, especially if you are pregnant, under 18, have diabetes or an eating disorder, or take medication.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdevstandard/
Privacy Policy: https://stayfasted.app/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
A calmer StayFasted, redrawn from the first screen to the last.
• A new look: more white space, larger type, one quiet accent color, and a dark mode that matches
• Apple Watch: see your fast, start or end it, log water, check in and breathe from your wrist
• Breathe: short breathing sessions for the moments a fast gets difficult. Two are free
• Deep Rest (Pro): a ten-minute guided rest for when you need to lie down and reset
• Progress photos on a month-by-month timeline, with your fasts and weight in between
• Reminders that follow your fast, and go quiet once you've checked in
• Edit a check-in after the fact
• Apple Health now saves your water, weight and mindful minutes, if you allow it
• No permission pop-ups at sign-up. The app explains why before it asks, and only when you use the feature
• Plainer words about fasting throughout. Ending a fast is always a fine choice
The developer, Jason Duval, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Health & Fitness
- Location
- User Content
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Jason Duval
- Size
- 9.5 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 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 11.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Pro Annual $39.99
- Pro Monthly $5.99
- Lifetime Access $49.99
- Copyright
- © 2026 Jason Duval