R90 sleep assistant
Manage your sleep cycle
Only for iPhone
Free · In‑App Purchases · Designed for iPhone
iPhone
Still worrying about your sleep quality? Try the R90 sleep method to transform your sleep.
The R90 sleep method, developed by the Premier League Manchester United's sports sleep coach, is designed according to the human body's natural biological rhythms. This scientifically-backed solution helps eliminate external and internal distractions, allowing you to follow your body's natural patterns and achieve better sleep.
Human sleep consists of two types: REM sleep (light sleep) and non-REM sleep (deep sleep). These alternate in approximately 90-minute cycles. Sleep quality isn't measured by absolute duration, but by completing full 90-minute cycles. The optimal R90 sleep pattern is 35 cycles per week.
For example, if you typically sleep from 12:00 AM to 7:30 AM, you complete exactly 5 cycles. But if you stay up until 1:00 AM and still wake at 7:30 AM, you'll be in deep sleep when your alarm goes off. Forcing yourself awake doesn't eliminate fatigue—it actually harms your body. According to R90 principles, you should adjust to sleep at 1:30 AM for exactly 4 cycles.
This app helps you calculate and follow the R90 method, providing timely reminders and tracking your weekly sleep cycles.
Key Features:
- Record your sleep patterns automatically
- Track completed sleep cycles each week
- Plan your optimal sleep schedule
- Smart bedtime and wake time calculations
- Weekly cycle goal tracking (35 cycles per week)
Pro Tip:A 30-minute or 90-minute nap at noon also counts as a complete cycle.
Note: This app integrates with HealthKit to read and write sleep data. Permission is required for optimal functionality.
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- Get smart wake time suggestions based on your past month's sleep patterns
- Delete sleep records with automatic Apple Health sync
- New bedtime reminders with customizable advance notice
- Enhanced HealthKit integration with more accurate sleep data reading
The developer, 阳 孙, 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
- Seller
- 阳 孙
- Size
- 1.4 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English and Simplified Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Fully unlocked $1.99
- Copyright
- © @2020 Sun yang