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Sleep Cycle alarm clock

  • Category: Healthcare & Fitness
  • Released date: 07/23/2009
  • Current Version: 3.0
  • Seller: Maciek Drejak Labs
  • Recommended Age: 4+
  • Download Size: 7091574
  • Last Update: 07/22/2011
  • Requirements: All

iPhone Screenshots

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An alarm clock that analyzes your sleep patterns and wakes you in the lightest sleep phase - a natural way to wake up where you feel rested and relaxed.

We are now helping more than 100 000 people to wake up rested!

#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 Netherlands
#1 Top Paid app in Taiwan
#1 Top Paid app in South Korea
#1 Top Paid app in Sweden
#1 Top Paid app in Norway
...and many more.

"It just works. Period. It does exactly what it advertises which is absolutely amazing."
-- 5/5 stars on

What some of our users are saying:
"I was baffled at how well it worked. Almost every day I used it, I felt refreshed when the alarm started." - Christina Karlsson

"Waking up at the right time is an amazing thing. I couldn't believe the difference it made!" - Michael Palka

"It felt like I was already awake and the iPhone just let me know it." - Anders Hejdenberg


* 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 that range from deep sleep to light sleep. The phase you are in when your alarm clock goes off is a critical factor regarding how tired you will feel when you wake up.

Since you move differently in bed during the different phases, Sleep Cycle uses the accelerometer in your iPhone to monitor your movement to determine which sleep phase you are in.

Sleep Cycle then wakes you in your lightest sleep phase.

Sleep Cycle was developed using proven sleep science and over a year of testing.

Sleep Cycle also saves your sleep data and displays a detailed sleep graph and sleep statistics for every night you use it.

Remember! Do NOT lock your phone when going to bed. Sleep Cycle automatically shuts down your screen and puts the phone into a power saving mode. If you lock your phone Sleep Cycle will not sense your movement and will then only be able to wake you at the end of the alarm time.

PLEASE NOTE: When Sleep Cycle is placed on a TABLE or FLOOR during the entire night it becomes extremely sensitive to movement. On some devices noise from the accelerometer can then be interpreted as movement and a random-looking graph is created. As long as you place Sleep Cycle according to the instructions it will correctly interpret movement and create correct graphs.


Ability to charge your phone by your bed
Ability to place your iPhone according to the instructions (see screenshots)
Sleep Cycle does not work with Tempur mattresses

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