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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 4.7.2

Fixing a critical bug fixing a stability issue for some users.

iPhone Screenshot

iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3
iPhone Screenshot 4

Customer Reviews

Have Used Sleep Cycle every night for 4 years

I really like and use this app every night - it is part of my daily routine. Great as an alarm clock, soothing wake tones. Shortened the wake window to 20 mins to avoid the occasional 30 min wake too early mornings. Really use the stats tracking over time to help adjust my daily habits to get better sleep averages for health reasons. Helps me understand what my body is doing and what I can do to improve things. Been able to increase my average of sleep quality from around 70% to around 80% over the past 12 months. Like the mix if short term stats, mid and long term stats.
Request - allow me to continue a nights sleep tracking after I turn off the alarm, for those cases when I decide to stay in bed longer.

Your data Analysis??

It's nice to see data: but the main, 99% reason I bought this ap, is so it would wake me up, and do an affective job at it. (Not so much interested in overall quality) ... So I'm interested in analysis/data about how good it is at this: how long was snooze on for?? Does quality of sleep affect how long snooze is employed? Or any other factor... I'm choosing "length of snooze" as I can't think of another method of judging when/how I wake up ... (As I OFTEN go back to sleep for an hour or 2 after my max snooze time. (And get 10 hrs sleep not 8)

Step counter is wrong

I was intrigued when I first noticed the inclusion of Steps. It led me to think more about my exercise levels - to the point where I have bought a fitness band. I would now like Sleep Cycle to read the data from that. I realise I must first sync my fitness band with my iPhone 6+, but having done that, it would be great to be able to select source of step counting, rather than your app only reading the iPhone's counter.

Sleep Cycle alarm clock
View In iTunes
  • $1.29
  • Category: Health & Fitness
  • Updated: 07 February 2015
  • Version: 4.7.2
  • Size: 30.0 MB
  • Languages: En, French, German, Italian, Japanese, Simplified Chinese, Spanish, Swedish
  • Seller: Northcube AB

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