Sleep Cycle Calc
Daniel Smith / J2J Studio
About this app
- Age 10
- Updated Aug 18, 2025
- OS IOS / Android
Editor reviews
Sleep Cycle Calc is a lightweight, science-based sleep calculator that helps you find optimal bedtimes and wake times based on sleep cycles. As a simple sleep cycle calculator and sleep optimization tool, it quickly suggests schedules to improve sleep quality and morning alertness. Key features include fast calculation of ideal sleep/wake times, customizable cycle length and wake windows, and concise recommendations for better rest. The app is designed for users who want a no-frills, efficient way to plan sleep and improve daily energy.
Screenshots
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How to use:
1. Download and open the app, then allow any requested time or notification permissions.
2. Enter your desired wake time or preferred total sleep duration and confirm or adjust the default cycle length (usually 90 minutes).
3. Tap Calculate to view recommended bedtimes or wake times based on sleep cycles, then select and save the schedule you prefer.
4. Set a reminder or alarm for the chosen time and use advanced options to customize cycle length, wake windows, or save frequent schedules for future use.