Use Sleep Calculator to find the best time to go to bed or wake up based on 90-minute sleep cycles. Calculate REM sleep, ideal sleep time, and wake up refreshed.
Cost / License
- Free
- Proprietary
Platforms
- Online

Shaolin Zen is described as 'Uncover the secrets of your sleep with detailed reports that analyze your sleep patterns, quality, risks, and effectiveness. Additionally, it identifies potential health concerns through risk moments detected during your sleep' and is an app in the sport & health category. There are more than 25 alternatives to Shaolin Zen for a variety of platforms, including iPhone, Android, iPad, Android Tablet and Web-based apps. The best Shaolin Zen alternative is Sleep as Android, which is free. Other great apps like Shaolin Zen are Sleep Cycle Alarm Clock, ShutEye, Pokémon Sleep and SleepRecovery.
Use Sleep Calculator to find the best time to go to bed or wake up based on 90-minute sleep cycles. Calculate REM sleep, ideal sleep time, and wake up refreshed.

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