Fast12: Intermittent Fasting
Autophagy & 12-Hour Tracker
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
Start your fasting journey the gentle way. Track 12-hour fasts, unlock autophagy, scan meals with AI, and build healthy habits without extreme diets.
Fast12 helps you build a simple, sustainable fasting routine - starting with the easiest win: a 12-hour overnight fast.
Close the kitchen at night, wake up feeling more in control, and build a healthy rhythm without extreme diets, complicated meal rules, or constant calorie maths.
Whether you are new to intermittent fasting or want a calmer way to stay consistent, Fast12 gives you the tools to track your fasting window, understand your body, and make better daily choices.
WHY FAST12?
• Simple fasting timer
Start, pause, complete and track your fasting windows with a clear, easy-to-use timer.
• Beginner-friendly 12-hour fasting
Fast12 is built around a gentle overnight fasting routine, helping you create consistency before chasing longer fasting windows.
• Smart fasting insights
See how your sleep, hydration, weight, energy and fasting habits connect over time.
• Personal coaching
Get guidance designed to help you improve your routine, stay consistent, and understand what may be affecting your progress.
• Hydration tracking
Log water, set daily goals, and spot when thirst may be mistaken for hunger.
• Sleep and recovery insights
Understand how sleep quality may influence cravings, energy and fasting consistency.
• Ai Meal Photo Scanner
Snap a quick photo to automatically estimate calories and log your daily meals.
• Meal guidance
Access fasting-friendly meal ideas and fast-breaking guidance to support your eating window.
• Progress and streaks
Build momentum with streaks, milestones and progress tracking that help you stay motivated.
• Apple Watch support
Track your fast from your wrist and keep your routine visible throughout the day.
• Widgets, Live Activities and Dynamic Island
Follow your fasting progress from your Home Screen, Lock Screen or Dynamic Island.
• Privacy-first by design
Your health and fasting data stays on your device. No account required.
FASTING MADE SIMPLE
Fast12 is not about perfection. It is about building one repeatable habit: finish eating, rest, sleep, and start again in the morning.
Use Fast12 to:
• Track 12:12, 14:10, 16:8 and other fasting schedules
• Log meals instantly with AI photo scanning
• Reduce late-night snacking
• Build a consistent eating rhythm
• Monitor hydration, sleep, energy and weight trends
• Understand your fasting phases
• Stay motivated with streaks and achievements
• Get personalised insights based on your routine
• Use Apple Watch, widgets and Live Activities for easy tracking
BUILT FOR REAL LIFE
Many fasting apps focus on advanced fasting windows, strict challenges or complicated routines. Fast12 is designed for people who want a simpler first step.
Start with a realistic overnight reset. Build consistency. Then adjust your fasting schedule when you are ready.
IMPORTANT HEALTH INFORMATION
Fast12 is a wellness and habit-tracking app. It does not provide medical advice, diagnosis or treatment. Intermittent fasting is not suitable for everyone, including some people who are pregnant, breastfeeding, under 18, underweight, have a history of eating disorders, or have certain medical conditions.
Speak to a qualified healthcare professional before starting intermittent fasting, changing your diet, or using Fast12 for weight management.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://fast12.d-app.online/privacy.html
Ratings & Reviews
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A fresh new look, streaks that count from Apple Watch and widgets, smarter reminder and fixed bugs
The developer, D App Online Ltd, 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:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- D App Online Ltd
- Size
- 30.6 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later. - Apple Watch
Requires watchOS 10.6 or later.
- iPhone
- Languages
- English
- Age Rating
16+
- 16+
- Frequent
Medical Treatment information
Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Fast12 Premium Annual $39.99
- Fast12 Premium Monthly $9.99
- Copyright
- © 2026 D App Online Ltd. All rights reserved.