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Sleep Cycle alarm clock

By Northcube AB


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Waking up made easy.

An intelligent alarm clock that analyzes your sleep and wakes you in the lightest sleep phase – the natural way to wake up feeling rested and relaxed.

Sleep Cycle helps millions of people to wake up rested!

Featured in: CNN, Wired, The Guardian, The Wall Street Journal, BBC, The New York Times and many more.

#1 Top Paid app in United States
#1 Top Paid app in United Kingdom
#1 Top Paid app in Japan
#1 Top Paid app in Germany
#1 Top Paid app in France
#1 Top Paid app in Russia
#1 Top Paid app in Canada
...and many more.

"It just works. Period. It does exactly what it advertises which is absolutely amazing."
-- 5/5 stars on

Sleep cycle is continuously rated as the best smart alarm clock, Sleep Cycle is now the worlds most used intelligent alarm clock.


* Sleep Cycle monitors your movement during sleep using the extremely sensitive accelerometer in your iPhone.

* Sleep Cycle then finds the optimal time to wake you up during a 30 minute window that ends at your set alarm time.

* Look at the screenshots for recommended iPhone placement.


As you sleep you go through different phases, ranging from deep sleep to light sleep. The phase you are in when your alarm goes off is critical for how tired you will feel when you wake up.

Since you move differently in bed during the different phases, Sleep Cycle can use the accelerometer in your iPhone to monitor your movement and determine which sleep phase you are in.

Sleep Cycle wakes you when you are in your lightest sleep phase.

Sleep Cycle was developed using proven sleep science and years of research and development.



√ Waking up made easy! Sleep Cycle analyzes your sleep and wakes you in your lightest sleep phase.

√ Detailed sleep statistics and sleep graphs for every night.

√ 15 carefully selected, high quality, alarm melodies.

√ Use iPod music as wake up sound

√ Snooze by shaking or tapping the phone lightly.

√ Customizable wake up window. From instant (regular alarm clock) up to 90 minutes.

√ Background mode - set your alarm and exit Sleep Cycle - sleep analysis will continue in the background

√ Sleep aid - helps you fall asleep. The intelligent mode detects when you fall asleep and automatically fades the sleep aid sound.

√ Support for the M7 and M8 co-processor - measure your daily physical activity and calculate how it affects your Sleep quality

√ Health app - fully integrated with the Health app introduced in iOS8. Submits sleep analysis and heart rate. Downloads other data such as fitness information to be considered in your nightly Sleep Quality

√ Adaptive design - ready for all screen sizes

√ Heart rate monitor - measure your resting heart rate (RHR) every morning using the camera and flash in your device

√ Philips HUE light bulb support - simulate a natural sunrise to give you an even softer wake-up

√ Sleep notes - see how events such as drinking coffee, eating too much or having a stressful day affect your sleep quality

√ Long term graphs - track sleep quality over time, see which days of the week you sleep best and much more

√ Export sleep data to Excel for detailed analysis


Ability to charge your phone by the bed
Ability to place your iPhone according to the instructions (see screenshots)

What's New in Version 4.8

- Edit Sleep Notes of previous sleep sessions.
- Change the set alarm time during active sleep session.
- Turn off or restart Sleep Aid during active sleep session.
- Weather feature reactivated.
- New design for setting alarm.
- Various fixes and improvements.

iPhone Screenshot

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Customer Reviews

solid sleep app.

i have used sleep cycle every night for over a year and it's one of my fave iPhone apps. the smart wake up phase is essential - no more groggy mornings! it's cool to have so much data on my sleeping habits over the course of the week, especially now that the weather is taken into account. turns out I always oversleep when it's raining: I love that it syncs to Health and out to my other fitness apps too, though i wish it knew the difference between sleep cycle recording with no sleep activity and actual sleep, since a night where it takes me a few hours past my bedtime to go to sleep still might track as a full night in other apps. also sometimes the auto switch from am to pm or vice versa when scrolling for an alarm time does happen, and sometimes it doesn't. this has lead to a couple of occasions where I've sleepily decided to give myself an extra hour or two of sleep on a weekend and accidentally set the alarm for 9pm! I'd love a 24:00 clock option for that reason. other than those minor issues this is a perfect, incredibly useful and functional app with a lovely style, and I've never had a single bug.

Excellent alarm and sleep monitoring tool

I've used this app for over a year now. As mentioned in other reviews the alarm really does wake you at the best time possible. I like to get up early to go to the gym most mornings while my husband sleeps until it's time to get up for work. While it is loud enough to wake me, it is quiet enough that it does not wake my husband. I have found the sleep analysis it provides to be very useful and have learned quite a bit about what I can do that will contribute to my having the best night's sleep possible.

Would Sleep With

As has been long established, this app is excellent for tracking sleep and helping to wake you up at a desirable time.

The recent update brought in a few neat features. The new alarm time screen looks fantabulous, and the ability to change the alarm time mid-tracking was a great idea. The sleep note editing is also useful for those who use that feature.

I love this app. You will love this app.

Sleep Cycle alarm clock
View In iTunes
  • $1.29
  • Category: Health & Fitness
  • Updated:
  • Version: 4.8
  • Size: 41.3 MB
  • Languages: English, French, German, Italian, Japanese, Simplified Chinese, Spanish, Swedish
  • Seller:

Compatibility: Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5, iPhone 6, and iPhone 6 Plus.

Customer Ratings

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Top In-App Purchases

  1. year SleepSecure membership$2.49