Sleep Calculator

Sleep Calculator Free App

Rated 4.53/5 (2,804) —  Free Android application by Thinkpozzitive

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About Sleep Calculator

Sleep Cycle Calculator helps you figure out when to go to sleep, and when to wake up, in order to feel rested, energized and refreshed and avoid the morning groggy feeling.


This is a free sleep app that can set an alarm for you to wake up in-between sleep cycles in order to start the day relaxed and with a clear mind.

Every time you go to sleep, you experience a series of sleep cycles that last on average 90 minutes, and waking up during one of the sleep cycles makes you feel groggy and exhausted even with plenty of hours of sleep - sleep cycle calculator tries to determine the best wake up times, or go to bed time in order to workaround this situation.

Perfect at figuring out sleep cycles and recommended for people who have trouble sleeping and don't have a fixed sleeping schedule.

There are four sleep calculation scenarios to choose from:
Scenario 1: you want to know when to go to sleep in order to wake up at a specified time. Sets a go to bed alarm.
Scenario 2: you want to know when to wake up if you go to bed at a specific time. Sets a wake up alarm.
Scenario 3: you want to know the best times to wake up if you go to sleep right now.
Scenario 4: you plan to take a power nap and you want to know when you should wake up.

What this app does
• This Sleep Calculator app is the Android companion of the website https://sleep-calculator.com/
• Calculates when you should wake up and when you should go to sleep in order to wake up in-between sleep cycles.
• Calculates when you should wake up if you were to go to sleep now or take a power-nap.
• Calculates a list of possible "go to bed" or "wake up" times depending on your needs.
• The app is able to add alarms to the default Android Alarm app by selecting a time entry available in the sleep cycles list.
• Sleep Calculator provides a settings option to take into account the time it takes for you to fall asleep (default: 14 minutes).
• Sleep Calculator provides a settings option to take into account the length of a sleep cycle (default: 90 minutes).
• The clock hour format used by sleep calculator is the devices current system setting (24 hours format or the AM/PM format).

What this app does not
It's not an alarm clock app replacement, it only allows you to add an alarm to your Android stock alarm clock app.

Translators: help translate Sleep Calculator in your language so others can enjoy it too! Join the translation project here: https://sleepcalculator.oneskyapp.com/collaboration

Keep in touch
Facebook: https://www.facebook.com/sleepcyclecalculatorapp/
Uservoice: http://sleepcalculator.uservoice.com/

Android version support: 4.1+

Permissions:
SET_ALARM - Allows you to quickly set alarms based on when you want to wake up.
INTERNET - AdMob Ads and statistics.

How to Download / Install

Download and install Sleep Calculator version 1.6.2 on your Android device!
Downloaded 100,000+ times, content rating: Everyone
Android package: com.cycle.sleepcalculator, download Sleep Calculator.apk

All Application Badges

Users love it
Free
downl.
Android
4.1+
Bug
buster
For everyone
Android app

App History & Updates

What's Changed
Changelog 1.6.2:
• Pull to refresh calculations on Scenarios 3 & 4
• Cycles list animation
• Bug fixes and performance improvements
Changelog 1.6.1:
• Added themes support. You can choose between 7 different light / dark themes.
• Added multi language support. Now you can choose the app language from the available app translations.
• Bugfixes
Version update Sleep Calculator was updated to version 1.6.2
More downloads  Sleep Calculator reached 100 000 - 500 000 downloads
Version update Sleep Calculator was updated to version 1.5.1
More downloads  Sleep Calculator reached 50 000 - 100 000 downloads

What are users saying about Sleep Calculator

N70%
by N####:

This app doesn't offer much. There are apps out there that do so much more. Also, it set an alarm for me to go to bed, I actually am usually asleep before this so the alarm wakes me up. Now I can't undo the alarm. I tried deleting the app and the alarm still sounds at 10:30pm. I can't figure out how to override it and stop it. I reloaded the app and that's not working. I'm not sure how.this app has such high ratings.

Z70%
by Z####:

Like how long most people should sleep, and what people who have trouble should do to fall asleep.

R70%
by R####:

I like this app, helps me decide when to go to sleep, helps with my routine

R70%
by R####:

Yes if it could material design like app icon it would be awesome !

B70%
by B####:

The cycle times the app suggests for waking up are pretty helpful and have actually gotten me to wake up feeling good!

R70%
by R####:

i am not listened alarm at morning

R70%
by R####:

I was looking for a sleep cycle Alarm and this is quick and convenient. What you see is what you get a sleep cycle calculator that sets up alarms accordingly

R70%
by R####:

Does it exactly what it needs to do. No problems so far.

R70%
by R####:

Very helpful

R70%
by R####:

Helps me to get up on time

R70%
by R####:

Does the trick

R70%
by R####:

Good thinking

R70%
by R####:

Loved it

R70%
by R####:

I've had sleeping problems for years. I would get enough sleeping time (8 hrs) but the quality of my sleep was poor. I would wake up everyday exhausted. A friend recommended this app and I love it. I immediately saw a change in how I felt when I awoke. No headaches, no tightened jaws, no drowsiness. Now I can't go to sleep without it.

R70%
by R####:

I've always heard about cycling sleep and understanding that there are certain items to wake up that are the better than others. Maan oh maaaan this app makes its super easy to wake up at the right time. I use it everyday, it'll even set alarms for you. Highly recommend for better sleep.

R70%
by R####:

There's not much to it, screenshots show it all. It works perfectly never failed me once. Definetely recommended. Thanks for the great work! And as a feedback, design (menus' look and logo specifically) can be improved in the future but it works and looks fine right now still.

R70%
by R####:

Solid, simple, and easy to use. It helps me wake up refreshed, even with a constantly changing sleep schedule.

R70%
by R####:

Great guide to help waking up and feeling refreshed. I hate waking up in middle of sleep cycles. This definitely helps.

R70%
by R####:

I love this app. It gives me peace of mind and security that I'm getting enough sleep and helps determine good sleeping patterns, even for naps.

D70%
by D####:

It doesn't have sleep record like other app. You don't need a app to do the simple math.

F70%
by F####:

I wake up rested and energized! I would recommend it to anybody having trouble waking up!

S70%
by S####:

A simple tool to calculate how many cicles you sleep , or planning to sleep. It has no problems whatsoever, 5 stars from me .

Q70%
by Q####:

It is pretty handy to know when to get the best sleep and not wake up groggy. Seems to be pretty accurate.

W70%
by W####:

I sleep much better now and actually get up with my alarm.

S70%
by S####:

Very easy to use and is not space consuming. Just what i needed :)

R70%
by R####:

It works well.

K70%
by K####:

Very good

R70%
by R####:

Needed some update

R70%
by R####:

I have used this app almost everyday, and helps me to evaluate the sleep I will need or sacrifice for tomorrow... Whether I adhere to my ridiculous expectations of how much sleep I actually need, or wake up accordingly, is my fault, but the app has never bombed, and has always done what was required of it. Very easy to use anf straight forward!

R70%
by R####:

Just do it. This app changed everything for me. No longer waking up dead tired, hating life, and hitting snooze 600 times in the morning. I'm now getting up easier, feeling better, and moving faster at work

H70%
by H####:

I used the website a lot until I learned about the app.If you follow the hours it gaves results.Wake up feeling full of energy after only 4-5hours of sleep.

T70%
by T####:

Awesome! I'm the poster child for power naps, and have been using sleep cycles, to increase my productivity and energy levels, for years. This app really helps.

R70%
by R####:

I have zero complaints about this app. There are no ads, it's user friendly, and I love how it syncs with my phone.

R70%
by R####:

The time works for my sleep cycles. It's great that it shows several different times I could wake up without disturbing my sleep.

Z70%
by Z####:

My windows were I can sleep are very limited, this helps me get the most out of the time I have!

R70%
by R####:

I no longer feel sleepy during the day! Thank you for such an great app.

F70%
by F####:

It really helped me to wake earlier and easier by sleeping and waking up using sleep cycles

R70%
by R####:

Faz o que se propõe

R70%
by R####:

This is a really useful and easy to use programme. It works

R70%
by R####:

It has all functions I need. I love it


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Rating Distribution

RATING
4.55
2,804 users

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