Sleep Calculator

3.9
695 reviews
100K+
Downloads
Content rating
PEGI 3
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About this app

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 brand new Smart Alarm will wake you up easy 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.
Updated on
Mar 19, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
App activity, App info and performance, and Device or other IDs
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

3.9
676 reviews
Dalton Messmer
February 13, 2024
I want to rate this higher. This was one of the few free sleep tracking apps I found with a custom notes feature (i.e. "good day", "bad day", "ate out", "exercised", etc.) - and for that it's great. HOWEVER, there is still no "export to CSV" or similar option, even after a couple years of requesting it from the dev, so I have years of data basically held hostage by this app. Also, there are occasional bugs which cause sleep tracking to end early and the alarm to never go off. Do not recommend.
5 people found this review helpful
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B C
November 7, 2023
Top recommend to all the other sleep tracking apps. This app is not a coach to help you sleep better. It provides data for 'you' to determine how to improve your sleep. No trial period and paywall for all the features like all the rest. Does not integrate with other fit apps or smartwatches, but barely drains phone battery while tracking.
12 people found this review helpful
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Bethlectic
March 28, 2024
Didn't realize it had other features, its a great little app. Tells you when to wake up and be refreshed based on average REM cycles and love that it has reminders to go to bed and alarm. I may be using it more often after realizing that. Nice to have everything in one place.
2 people found this review helpful
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