Sleep Cycle - Sleep Calculator icon

Sleep Cycle - Sleep Calculator v2.36

Contains ads • In-app purchases

Sleep Cycle - Sleep Calculator screenshot 0 Sleep Cycle - Sleep Calculator screenshot 1 Sleep Cycle - Sleep Calculator screenshot 2 Sleep Cycle - Sleep Calculator screenshot 3 Sleep Cycle - Sleep Calculator screenshot 4 Sleep Cycle - Sleep Calculator screenshot 5 Sleep Cycle - Sleep Calculator screenshot 6 Sleep Cycle - Sleep Calculator screenshot 7 Sleep Cycle - Sleep Calculator screenshot 8 Sleep Cycle - Sleep Calculator screenshot 9 Sleep Cycle - Sleep Calculator screenshot 10 Sleep Cycle - Sleep Calculator screenshot 11 Sleep Cycle - Sleep Calculator screenshot 12 Sleep Cycle - Sleep Calculator screenshot 13 Sleep Cycle - Sleep Calculator screenshot 14 Sleep Cycle - Sleep Calculator screenshot 15 Sleep Cycle - Sleep Calculator screenshot 16 Sleep Cycle - Sleep Calculator screenshot 17

About this app

Developer Description

Sleep and wake up in most natural way with sounds of the nature.

Does your phone alarm wake you up angry, make you mad for the whole day, and sometimes not even go off? Our sleep calculator will help you fall asleep and wake up in the most natural way and help you get your day started full of energy and with a smile on your face.

Waking up in the middle of a sleep cycle can leave you groggy and ruin your whole day. Our app helps you find the perfect moment to wake up or fall asleep in order to maximize your sleep and keep you fresh all day. A normal sleep cycle lasts 90 minutes and, using that as a foundation, our app calculates the exact moment when you’re brain and body are ready to awaken.

Our app uses natural sounds to slowly bring you out of your sleep cycle and make sure you are wide awake. Once you have selected the sound of your choice, the sound will be played slowly and steadily, increasing in volume, for one minute.
There are eight natural sounds you can choose from:

- Bird Song
- Birds in the forest
- Ambient loop
- Gentle piano
- Seaside Sounds
- Garden
- Rapid river
- Kenyan Savannah Grassland

The app allows you to choose:
- when to wake up
- when to go to sleep
- when to wake up if you sleep now

You can also set up alarm with the app and browse all "Sleep Time" alarms inside our app.
This app is perfect for modern people who often don't get enough sleep. This app allows you to maximize the amount and quality of sleep you get and make sure you are never late (or groggy) to a class or meeting again!

Features:
- calculates when to wake up and when to sleep to feel great
- calculates when to wake up if you are already asleep now
- add an alarm by clicking on a time
- light and Dark themes
- choose from 8 natural sounds
- browse all "Sleep Time" alarms inside the app

What's New

- bug fixes

In-app purchases

$0.99 - $8.49 per item

Version Information

Version
2.36
Downloads
100K+
Updated on
Dec 1, 2025
Released
Dec 17, 2018
Requires
Android 6.0

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Sleep Cycle - Sleep Calculator users say on Google Play

★★★★★
A Google user A Google user

makes my alarm clock every single night. this makes me feel sure that i am getting the proper & a healthy amount of sleep each night. perfect for naps during the day. this way i know how long or how short my nap should be & i wake up more refreshed. a feeling of knowing i slept enough & i pop out of bed when the alarm goes off.

34 Jul 23, 2019
★★★★
Luca Luca

Really great, will give full 5 stars when the "wake time" section is corrected (I have sent an email) I have been feeling a lot better in the mornings when I wake up in line with my sleep cycles Does have ads but it doesn't bother me since you only use the app for a short time each night

1 Jan 7, 2023
★★★
A Google user A Google user

Confuse.

2 Apr 20, 2020
A Google user A Google user

The alarm goes off some mornings and not others. It's completely inconsistent. No idea why. This is the second sleep cycle alarm app I've tried. Apparently the things don't work very well. Updated: This app is pure garbage. The alarm doesn't go off at all. Don't even bother installing it.

25 Jan 20, 2020

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