FastTam - fasting & diet
Fasting Made Simple
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Rebuilt around fasting alone. New: a weekly timeline colored by ketone depth, a monthly ketone heatmap, and a built-in fasting guide.
A tracker built for fasting and nothing else. See when you didn't eat — and how deep that stretch actually went — on one screen.
Built for you if you
• want to keep a routine like 16:8 going
• run 24, 48, or 72-hour fasts and want them staged
• would rather log fasting hours than calories or meals
• want fasting and weight in the same view
■ Fasting timer
14:10, 16:8, 18:6, 20:4, OMAD, or a window you set yourself. Run it once, or keep it as a repeating routine.
■ Ketone Boost
Separate 24, 48, and 72-hour targets, with the stage you're in right now.
■ A log read by ketone depth
The weekly timeline colors each fast by ketone depth rather than length. A fast and the eating window that follows it sit in one capsule, so the shape of the day is right there.
■ Monthly heatmap
A month of ketone activity in a single view. Tap through for what each tier means.
■ Weight
Log your weight the moment a fast ends. Your goal weight and recent trend are read together, so you know which way things are going.
■ Fasting coach
Short, time-aware guidance on the home screen for wherever you are in the fast.
■ Fasting guide
Six common mistakes, plus the safety signals that mean stop.
■ Live Activity and widgets
Time remaining on the Lock Screen, in the Dynamic Island, and in a home screen widget. Start and end notifications included.
■ Share your month
Turn a month of fasts into a card image and share it.
■ iCloud sync
Your log carries across devices on the same Apple Account.
Ads can be removed with a one-time purchase.
[Disclaimer] This app does not provide medical advice. Talk to a professional before starting a fast or changing your diet. If you are pregnant or nursing, or have diabetes or a history of eating disorders, consult a doctor first.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Premium widgets: Monthly Record, Quick Start, Weight and Lock Screen. One purchase also removes ads.
• A rebuilt log screen. See fasting and weight together in one chart with "Both".
• Your fast in progress now burns along the stage track like a lit fuse.
• If you take a GLP-1 medication, you'll see a caution before fasts longer than 48 hours.
• A new app icon.
The developer, Iksang Hwang, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
- Other Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Health & Fitness
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Iksang Hwang
- Size
- 19.2 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.
- iPhone
- Languages
English and 10 more
- English, French, German, Indonesian, Italian, Japanese, Korean, Portuguese, Spanish, Thai, Vietnamese
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contains
Advertising
Health or Wellness Topics
- In-App Purchases
Yes
- Premium $4.99
- Copyright
- © 2026 Iksang Hwang