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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.

#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 5.4.1

Snore detection implemented in Trends. With the latest release, Sleep Cycle does not only detect, measure, and track your snoring - it also gives you historical snore data in the Premium Trends view.


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Customer Reviews

Interesting but is it always reliable?

It's fascinating to see how my sleep cycles roll out, and I'd even say it's a motivator for me to get a better night's sleep. The alarms are great for me too, the gradual shift in volume is so much better than a sudden jarring loud default iPhone alarm.
However, last night I noticed something odd - I was analysing sleep only - no alarm - and I woke up at 5am, was awake for a good ten minutes at least and did a considerable bit of shuffling around in order to get back to sleep. I even picked my phone up, which is how I know it was 5am. But then when I woke up properly at a more reasonable time, I swiped up to stop the analysis and see the results - only to find it hasn't recorded me being awake at all at 5am. There isn't any indication of me being awake at the time I looked at my phone, WHILE AWAKE, on the chart. I think I'll keep using it but my faith in its accuracy has fallen considerably if it can't even tell when I'm fully awake!


Not sure how accurate this app is but do find it addictive. Have used for a week now and just had to upgrade to listen to my snoring! I have to assume it is me snoring and not my wife! Thinking of putting my other iPad on her side of the bed to check.

Sleep quality and cycles is a very interesting subject and this app really helps you anylise how you sleep. Facility to add notes to each sample can be very useful when looking back over your results. The premium upgrade is free to try for a month but I am confident that I will continue once that expires. Well done developer. One of the best apps I gave used.

Very useful and interesting app

I've had this app for several years and over that time it's been really well maintained and developed. I often use it while travelling for work both as an alarm clock and to see how well I've slept. I often don't sleep well in a strange bed but it's easy to think you lay awake for ages when in fact it may only have been an hour of so and you actually had five or six hours good sleep. Somehow seeing this objective measure from the app cheers me up in the morning and I feel better able to face the challenges of the day ahead. Works for me !

Sleep Cycle alarm clock
View in iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Health & Fitness
  • Updated:
  • Version: 5.4.1
  • Size: 79.3 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. Premium£17.99
  4. Premium£24.99
  5. Premium£3.99
  6. Premium£8.49
  7. Premium£2.29
  8. Premium£4.99
  9. year SleepSecure membership£1.99
  10. Premium£11.99