Sleep Time - Alarm Calculator

4.6
5.55K reviews
1M+
Downloads
Content rating
Everyone
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About this app

Wake up refreshed with Sleep Time, a simple sleep cycle calculator!

Features:
- Sleek, fast material design
- Calculate optimal wake-up or sleep times
- Notifications for bedtime and wake-up
- Includes time to fall asleep

For feedback or bug reports, use the settings tab in the app.
Updated on
Jul 29, 2025

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
No data collected
Learn more about how developers declare collection

Ratings and reviews

4.7
5.4K reviews
Mariana Aguilera
May 13, 2020
Since using this app, I have definitely noticed a difference in my sleep. I wake up feeling energized, refreshed, and less cloudy in the mornings. I love how it adds the amount of time it takes for me to go to sleep within the sleep cycle calculation. This app also sets an alarm directly to the default alarm app on my phone at the press of a button. There are no ads and it has a simple, easy to follow format. This app was definitely worth the download! Loved it!
219 people found this review helpful
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Jason Flint
July 28, 2024
I used to use this app every night and it was perfect. The old app would take you to the clock app so you could verify the alarm. Today I didn't get an alarm because the app didn't send my alarm time (maybe I didn't set it right) and didn't take me to the clock app to verify. My fault for not double checking, but the old version was much better. Thanks to the Developer for fixing the issue quickly! (I still like the old UI better, but the app works great)
10 people found this review helpful
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Oleg Filimonov
July 24, 2024
that issue is fixed ;)
Tomáš Weglarz
July 19, 2025
does what you need and does it perfectly. I would appreciate more options sk there is definitely a room for improvement but honestly its a free app with no ads and it just works. I use it every day and cannot live without it.
4 people found this review helpful
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