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Sleep Cycle alarm clock

By Northcube AB

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. No need to place your device in bed - Sleep Cycles uses sound analysis sleep tracking.

Sleep Cycle helps millions of people all around the world wake up rested.

Continuously rated as the best smart alarm clock on the market. 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.

* 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

√ Snore detection - detect, track and measure your snoring

√ 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

√ Snore trends - view historical snore trends data

√ 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 5.4.5

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

Heart rate at wake-up still unreliable

For the most part, the app works pretty well. I was dismayed to see that when they updated the app to work with inductive charging positions (I.e., the phone is face up), there was no clear indication to not put the phone to sleep. I put it to sleep the first few nights because I wasn’t used to seeing the backlight on constantly (I have an 8 Plus) and awoke to see a slew of notifications saying I needed to wake my phone. While that’s not a huge deal, I found zero documentation.

Also, the update for 8 Plus heart rate monitoring at wake up still rarely, if ever works. I will sit there for at least 90 seconds with my phone starting to heat my finger with the flash because it still won’t accurately pick my heart rate up. My display will go to sleep at least three times all the while, which is useful when I’m super groggy. Needless to say, I turned the heart rate feature off.

It’s been smooth other than that. One remaining question is that when searching the help docs on the app, there’s no link to contact the developer. I’d never noticed that until I tried looking for ways to alleviate the problems noted above. That seems pretty “meh” for an app I have to pay for every year. I also pay for the Life Cycle app too.

Alarm good, recording movement bad, needs iWatch support

As an alarm clock it works well. For recording sleep analytics it’s a failure for me.

The first few weeks after I downloaded and started using the app it was great. I could see movement analytics and my occasional snoring was being recorded. I then purchased the annual support to keep the recordings. A few weeks later something happened because the app has only shown movement once or twice since then. I followed all instructions from my support case and it finally worked once more so I thought I had found the solution and closed the support case. Since then it again quit showing any movement when I sleep. I had already purchased the annual support to record my sleep analytics but that is money down the drain now.

It’s free to download and use so give it a chance. If it works for you great. If not, try Pillow. That app includes iWatch support and records my sleep movements more realistically than just using the iPhone microphone with this app.

Cool app, But has always picks up husbands snore!

Despite the developers stating that this app won’t pick you your spouses snore, that is NOT accurate. It has picked it up every time without fail and I FLAT OUT don’t snore. I think because of that, it also makes my stats a bit wonky. I don’t put a lot of faith in my deep sleep cycles it shows, due to it picking up my husbands snoring, which is bad (both his parents have sleep apnea). The stats just DON’T seem accurate. When I tossed and turned all night and felt as if I got 2 hours sleep at best, the app claims I got 98% sleep and that I had multiple solid deep sleep cycles; not possible. Maybe for my husband but NOT me.

I operate on an iPhone X and I have always remained up to date on ALL app updates and software updates. I have now been through the app monitoring 200 nights of sleep. I like the app, it’s cool, but I am a bit disappointed because there is NO way it’s accurate picking up my spouses chronic snoring habits.

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
  • 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. Sleep Cycle Premium$29.99
  4. Premium$23.99
  5. Premium$4.99
  6. Premium$10.99
  7. Premium$2.99
  8. Premium$14.99
  9. year SleepSecure membership$1.99
  10. Premium$8.99