Apps > Paid Apps > Health & Fitness

Price: $0.99

Category: Health & Fitness

Updated: Jul 01, 2015

Version: 4.8

Size: 41.3 MB

Seller: Northcube AB

Rated 4+

Requirements: 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

Current Version

(3602 Ratings)

All Versions

(78517 Ratings)

Sleep Cycle alarm clock by Northcube AB

Sleep Cycle alarm clock Screenshots


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 4.8

– Edit Sleep Notes of previous sleep sessions.
– Change the set alarm time during active sleep session.
– Turn off or restart Sleep Aid during active sleep session.
– Weather feature reactivated.
– New design for setting alarm.
– Various fixes and improvements.

Customer Reviews

The Secret to Waking Up on Time (5 stars)
I think I have found the perfect combination of alarm clocks. I always set Sleep Cycle to be my first alarm, and another app called SpinMe Alarm Clock as my backup. Sleep Cycle usually wakes me up in my optimal wake up time, but sometimes it just isnt enough for me and Ill either snooze through it or turn it off and go back to bed. If Sleep Cycle fails to wake me up, my backup alarm SpinMe will start blaring which can only be turned of

Fantastic! (5 stars)
(Updating again! This review is now a couple of years (or more?) old, and still holds true (and then some!) )

(Updating; this review is from over a year ago, and it still holds true today!)

I've used this app almost every single night since I got it months ago! It's really helped me see why I've been feeling horrible every morning; apparently I toss and turn throughout the night, lol. I highly recommend this app for anyone

Data Hound (5 stars)
I usually sleep until I absolutely have to get up via the smart snooze feature, so the waking up part isn't as useful as I'm sure it is for most people. HOWEVER. It's a super reliable alarm that never fails to wake me up because of the randomizing alarm sounds. It blocks out notifications while it's running in the foreground, which is awesome because my job sometimes involves people texting me at 3am for dumb reasons and if I'm asleep I don'

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