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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 $29.99 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 5.3.5

Bug fixes and improvements


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Customer Reviews

Now completely unreliable

I have been using this alarm since at least 2012. For years, I found it completely reliable and never thought that I would have any issue with it going off. However, the last few months, it is anything but. Sometimes it completely shuts itself off. Sometimes it will go off the first time, and after snoozing will never alarm again, even though my snooze is set to every seven minutes. Now recently in the last couple days I've noticed that if I get a phone call, It completely shuts it self off. Why is it up to the app to decide a phone call means I'm waking up? I contacted the developers regarding the problems that I was having several weeks ago, and they told me that I needed to leave the app running in the foreground. First of all, that never used to be a requirement which was the number one reason that I found this app more useful and reliable than any others, as none of the others would work at all if it was running in the background. In any case, I did as they said, and made sure it always stayed running in the foreground. However that has still been no assurance that this app will actually alarm when scheduled. I'm afraid I've had too many close calls, that I can no longer use this app and will be spending the rest of my day looking for a new one. 😞

Absolutely Works—Cures Morning Drowsiness

The claims made by the developer and by the many people who have reviewed the app are almost sensationalist in nature. And yet, it works. As hard as it was for me to believe it when I downloaded the app a couple years ago, I simply cannot deny that it works.

When comparing the quality of my sleep on the nights when I use the app over the nights when I don't, it's plainly obvious that I sleep objectively better when I do. Even when I go to bed later than I should if, for example, I have class in the morning, I wake up refreshed and disinclined to hit the snooze button more than once, if at all (bearing in mind that I'm the type of person who'll happily hit it six or seven times otherwise).

Get this app. The amount you're expected to pay for it is the absolute definition of a bargain for the sheer benefit that it has the potential to give you.

Love this app!!!!

I've had this app for two plus years now and I love it!! Over the passed 10 years, since I reached adulthood, I've had to buy many, many alarm clocks because I would always sleep through the alarm and wake up late. However, since downloading this app I haven't missed an alarm once! I love how you can set it to play a random tone every time it goes off and that it goes off when you're in a light sleep cycle. It makes it much easier to wake up. You never get that feeling of being jolted awake abruptly. I subscribed to the full version and it is totally worth it! I love seeing the statistics and seeing how what you did, ate or took throughout the day affects your sleep patterns. Because of that this app has helped me improve my quality of sleep and life! Not one thing I would change. Absolute five stars!! Love it!! Keep up the great work, developer(s)!!!!

Sleep Cycle alarm clock
View in iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Health & Fitness
  • Updated:
  • Version: 5.3.5
  • Size: 78.5 MB
  • Languages: English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese, Turkish
  • Seller:

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$1.99
  2. Premium$9.99
  3. Premium$23.99
  4. Premium$4.99
  5. Premium$29.99
  6. Premium$10.99
  7. Premium$2.99
  8. year SleepSecure membership$1.99
  9. Premium$6.99
  10. Premium$14.99