About Sleep Calculator
Good day starts with good morning! Go to bed at the right time and wake up in between your natural 90-minute sleep cycles to feel rested and refreshed. A good night's sleep consists of 5-6 complete sleep cycles. ◦ Select...
Good day starts with good morning! Go to bed at the right time and wake up in between your natural 90-minute sleep cycles to feel rested and refreshed. A good night's sleep consists of 5-6 complete sleep cycles.
◦ Select when you want to wake up
◦ Calculate your best time to go to sleep
◦ Calculate the best time to wake up
It takes an average human about 15 minutes to fall asleep. If you wake up at one of the calculated times, you'll rise in between 90-minute sleep cycles.
Sleep Calculator helps you decide when to go to bed so that you can wake at a specific time ensuring a good night’s rest, or what time you should wake up if you want to go to bed right now.
If you want to determine your real sleep cycles - our Sleep Tracker functionality allows you to track and analyze your sleep and, if done correctly, will show you your sleep progress – when you were in light, deep or REM (dream) sleep phase and the breakdown of your sleep cycles. Snoring/noise detection can be enabled as well.
Our Smart Alarm will wake you up gently in the lightest sleep phase, making sure you wake up easy and rested.
Bedtime notifications can also be set up so that you do not miss a proper time to go to sleep.
Previous Versions
Here you can find the changelog of Sleep Calculator since it was posted on our website on 2020-07-14 20:50:44.
The latest version is 1.2.178 and it was updated on 2026-10-18 00:34:21. See below the changes in each version.
Sleep Calculator version 1.2.178
Updated At: 2026-09-28
Changes: Stability fixes and improvements.
Sleep Calculator version 1.2.129
Updated At: 2026-09-19
Sleep Calculator version 1.2.036
Updated At: 2024-03-19
Changes: - ability to customize sleep cycle length
Sleep Calculator version
Updated At: 2021-05-04
Changes: Bug fixes and minor improvements
Sleep Calculator version
Updated At: 2021-05-04
Changes: - microphone-based sleep tracking and smart alarm
- varios fixes and improvements
Sleep Calculator version
Updated At: 2021-02-06
Changes: - ability to back up sleep data to Google Drive
- bug fixes and improvements
Sleep Calculator version
Updated At: 2020-10-05
Changes: - sleep sharing
- sleep editing
- sleep sounds
- hold button to stop sleep tracking
- smart alarm improvements
- ready for android 11
- bug fixes
Sleep Calculator version
Updated At: 2020-09-05
Changes: Our BIG 2020 update is now available!
New features include:
◦ smart alarm - wake up easy in your lightest sleep phase
◦ sleep notes - determine how your habits influence your sleep
◦ historical charts/trends
◦ sleep quality percentage
◦ changeable alarm sounds
◦ switch between single and multiple noise bars in Data
◦ bug fixes
Disclaimer
Official Google Play Link
We do not host Sleep Calculator on our servers. We did not scan it for viruses, adware, spyware or other type of malware. This app is hosted by Google and passed their terms and conditions to be listed there. We recommend caution when installing it.
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