Fast Window - Fasting Tracker
Your 16:8 clock on Lock Screen
Only for iPhone
Free · In-App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
See how long you've been fasting right on your Lock Screen — without opening the app.
Fasting Timer is an intermittent fasting clock that shows your day as a 24-hour dial. Instead of a progress bar, your fast is drawn as an arc on a real clock face — "from 9:30 last night until 1:30 this afternoon" — so you see when you can eat, not just how long you've held on.
● Lock Screen widgets, Live Activity and Dynamic Island — always accurate, even with the app closed
● No 23-hour cap — the arc keeps growing past your goal
● Zero ads, no account, no server — fully local, works offline
● Your history stays — a 30-day dial calendar plus automatic iCloud backup
● Reminders for your first meal and your next fast
Free forever
- Timer with 16:8, 18:6, 20:4 and OMAD presets
- Lock Screen widgets (circular, rectangular, inline) and Live Activity
- Overtime counting, 30-day history, iCloud backup
Premium (subscription)
- Custom fast length (1–72 hours) and extended 36/72-hour fasts
- Full history beyond 30 days
- CSV export
About subscriptions: Premium is a monthly or yearly subscription. The yearly plan starts with a 7-day free trial. Subscriptions renew automatically unless canceled at least 24 hours before the end of the period, and payment is charged to your Apple ID account. Manage or cancel in your App Store account settings.
This app provides general reference information and is not medical advice. Consult a professional before fasting if you have a health condition.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://aside.ai.kr/en/apps/fasting/privacy
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
The developer, Yunseong Jung, 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
- Provider
- Yunseong Jung
- Size
- 20 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 14.0 or later.
- iPhone
Requires iOS 14.0 or later. - iPod touch
Requires iOS 14.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Premium Yearly USD 6.99
- Premium Monthly USD 0.99
- Copyright
- © 2026 Aside