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Sleep Cycle alarm clock

By Northcube AB

Editors' Choice

This app is only available on the App Store for iOS devices.


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.

#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
...and 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 and is the world’s most used intelligent alarm clock.


* Our patented technology monitors your sleep movements using sound or vibration analysis.

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

* Recommended placement: Near the bed or on the floor.


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 microphone or accelerometer in your iPhone to monitor your movements 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.




√ Sleep analysis with our patented sound analysis technology or if you prefer, the sensitive accelerometer in your iPhone

√ Detailed sleep statistics and sleep graphs

√ Carefully selected alarm melodies

√ Snooze by shaking or double tapping the phone lightly

√ Fully integrated with Apple Health. Exchanges sleep analysis and heart rate

√ 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

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

√ Export sleep data to Excel for detailed analysis


√ Online backup - secure your data online to make sure it’s always with you

√ Long term trends - compare your sleep with the world

√ Sleep aid - helps you fall asleep faster

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

√ Wake up mood - see how using Sleep Cycle affects your morning moods

√ Weather - see how weather affects your Sleep Quality

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

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

and more


Ability to charge your phone by the bed.
Ability to place your phone near the bed, such as on a nightstand table or on the floor.


The optional Premium subscription costs $39.99 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 and Privacy:

What's New in Version 5.4.5

New optimizations for iPhone X and iPhone 8, including improved heart rate reading and support to keep device face up during night.


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Customer Reviews

Interesting but is it accurate?

I enjoy using Sleep Cycle but I am not convinced that it is very accurate. I do not sleep well and wake frequently during the night. Sleep cycle seems to be reasonably accurate for the first part of the night but quite inaccurate after that. It will for example show me as having been in deep sleep when I know I was awake. It also records me as having been snoring when I was awake. I think that when I get up in the night, which I do often, it switches to recording my wife’s sleep and does not return to recording me when I return to bed. So an interesting app but not of much practical value.

Not sure it works

Im pretty sure this app tracks my husband and not me, for instance it has recorded me snoring and shows me in a deep sleep but i have actually been awake listening to my husband snoring at that time. It also tends to wake me up in the first 10mins of the 30min alarm window and a couple of times i have been dreaming, in a pretty deep sleep, so i end up feeling more groggy. On a plus side i bought this app ages ago and recently re-downloaded it so now i get the premium features for life.

Philips Hue integration keeps failing

I bought a set of PHILIPS hue bulbs and the premium subscription to use sleepcycle as a wake up light. When it works it’s fantastic! However, it frequently and randomly ‘loses’ the integration and I can’t get it to work. Support simply told me to reset the hue bridge (that’s a big job as it involves deleting every bulb, every accessory, every setting, every time!) and it still doesn’t work. Just as randomly, the connection reappears for a day or two sometimes- and then Disappears without warning. It’s been a costly exercise and with no help from northcube. Really disappointed.

Sleep Cycle alarm clock
View in iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Health & Fitness
  • Updated:
  • Version: 5.4.5
  • Size: 84.4 MB
  • Languages: English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese, Turkish
  • Developer:

Compatibility: Requires iOS 9.0 or later. Compatible with iPhone, iPad and iPod touch.

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. Premium£1.49
  2. Premium£7.99
  3. Sleep Cycle Premium£24.99
  4. Premium£17.99
  5. Premium£3.99
  6. Premium£8.49
  7. Premium£2.29
  8. Premium£11.99
  9. Premium£6.99
  10. year SleepSecure membership£1.99