天使と悪魔のファスティング
断食・ファスティングをサポート
Free · Designed for iPad. Not verified for macOS.
Fast at your pace on a quiet island.
Fasting Island is an intermittent fasting timer with two very different companions on your shoulders. The angel cheers you on, the devil tempts you to stop, and sometimes they both break character. Their playful banter keeps fasting from feeling too serious.
SIMPLE FASTING TIMER
Choose a 12:12, 14:10, or 16:8 plan. Start and finish with a tap, check elapsed time and goal progress, and adjust the start time later if needed.
SIX FASTING STAGES
Follow an easy-to-read guide through six estimated stages, from digestion and steadier blood sugar to fat use, ketosis, and autophagy-related repair. Stage timing is educational and may vary from person to person; it is not a medical measurement.
ANGEL & DEVIL COMPANIONS
Get encouragement from one shoulder and comic temptation from the other. Choose male or female character versions and enjoy occasional role reversals.
HISTORY & STATISTICS
Keep your fasting history without a time limit. Review recent sessions, totals, longest and average fasts, view a weekly chart, and export your records as CSV.
OFFLINE AND PRIVATE
The timer and on-device records work without an internet connection. No account is required, and your records stay on your device.
SAFETY
Fasting Island supports healthy routines but does not provide medical advice. Stop if you feel unwell. It is not recommended during pregnancy or for people with a history of eating disorders. If you have a medical condition or take medication, consult a qualified healthcare professional before fasting.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The timer now ends and saves your record automatically after 72 hours of counted time. If the app was closed, it saves the record at the 72-hour endpoint when reopened. Paused time is excluded. This is a recording limit, not a recommended fasting duration.
The developer, RYOJI TAKAHASHI, 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:
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- RYOJI TAKAHASHI
- Size
- 53.6 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.
- iPhone
- Languages
- English and Japanese
- Age Rating
18+
- 18+
- Frequent
Alcohol, Tobacco, Drug Use or References
Infrequent
Medical Treatment information
Contains
Advertising
Health or Wellness Topics
- Copyright
- © 2026 RTInformation