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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 your own 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

√ 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)


The optional yearly SleepSecure subscription costs $1.99 per year.

It will be charged from your iTunes account after the purchase. You can manage or cancel your auto-renewable subscription by entering the user settings in iTunes after the purchase. The subscription will be auto-renewed 24 hours before the subscription period ends with the same kind of subscription you already bought to the same price. It's not possible to abort the subscription during the time it's active. Terms:

What's New in Version 4.8.1

* Fixed a SleepSecure issue
* General stability and performance improvements

iPhone Screenshot

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Customer Reviews

Back to healthy cycles

The app has helped me focus on my sleep cycles and therefore be able to improve my sleep for the first time in over a decade. As a result of the app features I have become conscious of sleep notes and the various outcomes on sleep quality. Finally I have managed to get back to my natural cycles without even using the alarm but still tracking my sleep quality. I now sleep the recommended amount of 7-8 hrs every night and wait up at the same time each day without an alarm!

Love It

I've been using this app for well over a year and it has helped me focus on my sleep patterns - I sort of already knew that I needed to get to bed earlier, but seeing it graphed and having data makes it real!

Waking up is easier too - another rater correctly noted that you usually feel like you're already awake when the alarm goes off...which is better than being jarred out of a sleep!

Great app!

Best health app on my phone

This app has had a huge effect on the reformation of my habits, understanding of my personal health and requirements. Increasing my awareness by linking together activities that have both positive and negative effects on my sleep, and by extension my health as a whole. I feel that everyone should be using sleep cycle, and would be far better off if they were!

Sleep Cycle alarm clock
View In iTunes
  • $0.99
  • Category: Health & Fitness
  • Updated:
  • Version: 4.8.1
  • Size: 41.6 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.

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. year SleepSecure membership$2.99
  2. SleepSecure$2.99