Sleep Cycle uses a wake up phase (30 minutes by default) that ends at your desired alarm time.

During this phase Sleep Cycle will monitor signals from your body to wake you softly, when you are in the lightest possible sleep state.

Sleep Cycle has two motion detection modes, microphone or accelerometer.
You can change modes under:
Settings > Motion detection (if Alarm is turned On in Settings).

The built-in microphone is used to analyze your movements as you sleep. It’s important that you place your phone correctly:


The accelerometer is used to analyze your movements as you sleep. It’s important that you place your phone correctly:


Depending on your type of bed and mattress you might find certain placements work better. Please do not place your iPhone underneath a pillow or thick mattress as it can become warm when charging.

If you feel uncomfortable having an iPhone close to your head, you may set it to Flight Mode. As a bonus this also ensures that no one can bother you while you sleep.

Snooze by simply double-tapping near the phone while using the microphone, or on the phone while using the accelerometer. Picking up the phone will automatically snooze.

Sleep Cycle has two snooze modes:

Intelligent snooze
Intelligent snooze lets you snooze through your wake up phase. Each snooze duration becomes shorter, gently bringing you from asleep to completely awake at your desired alarm time.

Regular snooze
Regular snooze lets you choose a specific snooze time between 1-20 minutes. You can snooze an unlimited number of times.

You can change modes under Settings. Snooze can also be completely disabled.

Waking up easy is all about timing. Sleep Cycle alarm clock tracks your sleep patterns and wakes you up during light sleep. Waking up during light sleep feels like waking up naturally rested without an alarm clock.

Sleep Cycles
While you sleep, you go through a cycle of sleep phases. The first phase is light sleep, followed by deep sleep and a dream state referred to as REM-sleep. A full sleep cycle lasts about 90 minutes and is normally repeated several times each night.

Sleep Cycle alarm clock
Your movements vary with each sleep phase. Sleep Cycle uses sound analysis to identify sleep phases by tracking movements in bed. Sleep Cycle then wakes you up during your lightest sleep phase, using a predefined 30-minute alarm window.


During the night, our sleep state alternates between rapid eye movement (REM) and other states (collectively referred to as non-REM).

Non-REM sleep is divided into three stages. The first two stages account for light sleep, the third is deep sleep.

For the typical person, it takes about 45 minutes to slip through the first two stages into the last. In these stages most physiological processes are greatly reduced. It’s very difficult to wake a person in deep sleep. Incidentally, nightmares can occur during this time.

After about 90 minutes, we enter into REM sleep in which brain activity changes dramatically. Our muscles become inhibited but our eyes start flickering, hence Rapid Eye Movement.

In fact, brain activity is said to be more intense in REM than when we are awake. Most dreaming also occurs in REM. The muscle paralysis keeps us from acting out our dreams, even though our eyes move according to what we see in our dreams.

Sleep Cycles
A typical adult will enter REM sleep roughly every 90 minutes. Each time REM lasts a little longer. Upon completion of REM the body starts the sleep cycle again. This nomally repeats 4-5 times per night.

Non-REM is believed to help the brain’s physiological processes reboot, while REM is believed to help us work through psychological needs.

Recent research indicates that REM sleep is necessary for processing new information, i.e. learning. Early in life we spend about 50% of our sleep in REM. But from about the age of 10 we stabilize at about 25%.

When we are sleep deprived we spend more time in non-REM, verifying our body’s need to “reboot”. This also means less time spent in REM sleep, leading to irritability and emotional problems.

Top questions

No. Everyone who has purchased Sleep Cycle before will get the Premium features for free, except for Online backup which will remain a subscription service. If you have an existing SleepSecure account, you can use this to login to our Online backup service.
We’ve identified a problem where some users don’t get Premium for free, this issue has been resolved in version 5.0.1.

It’s perfectly fine to place the phone on the floor next to the bed. The analysis works well from a bit of distance, although the closer the phone is to your body the better.

Yes, Sleep Cycle fully supports Apple Health App. Sleep Cycle will ask you for permission to sync with the Health App after your 15th night. You can also activate this under Settings / Advanced / Apple Health. We write the following data to Apple Health: Sleep Analysis and Heart Rate. Privacy Policy.

Not yet. More information will be available when we know more.


The app uses the microphone for noise analysis and some background support. It does not record, externally download or store anything. All sound is analyzed in real time and thereafter discarded.

You can still use the app without the permission if you use the accelerometer as the primary source for analysis.

No sound is downloaded externally or stored on the device.

Sleep Cycle analyses the sound in short chunks. Each chunk is 1/10 of a second. The sound is analyzed in real-time on the device. Once the sound has been analyzed and added to the sleep analysis (taking milliseconds), the sound is instantly discarded.

Yes. You can exit Sleep Cycle after you have activated your alarm, and you will see a red bar in the top of the iOS menu. Background mode is fully supported.

Yes. Just make sure to lock your phone after setting the alarm, since DND only works when the phone is locked.

Important: Your incoming messages will always be muted when Sleep Cycle is used in the background and without Airplay (only available when using motion detection accelerometer) set to On. Keep Sleep Cycle in the foreground without locking the phone and activate Airplay in Settings> Airplay if you want your incoming messages to sound.

To be able to hear notifications while using the app you need to do the following steps:

Activate AirPlay support (only available when using motion detection accelerometer) under Settings> Airplay and keep Sleep Cycle in the foreground without locking the phone. Sleep Cycle will still function normally and the alarm will sound through your phone, (unless you actually connect AirPlay speakers).

Yes. Under Settings, at the top of the screen, just toggle Alarm to Off. Sleep Cycle will now only analyze your sleep and not wake you up.

Sleep Cycle’s Sleep Quality is affected by two factors:

* Sleep quantity
* Frequency of movement

In short, the more you sleep and the less you move, the higher Sleep Quality you will get.

Sleep Quality will be calibrated the first nights using Sleep Cycle, and the value will be more and more accurate over time.

We are currently researching the next version of Sleep Quality, with factors such as waking up in the middle of night, % deep sleep, number of sleep cycles etc. affect the value.

It is not possible for us to automatically set airplane mode when going to bed, this is limited by Apple.


Sleep Cycle Freemium includes:

  • Intelligent wake-up
  • Sleep analysis
  • Nightly sleep graph
  • Alarm melodies
  • Snooze
  • Apple Health integration
  • Database export

Sleep Cycle Premium includes:

  • Online back-up with SleepSecure
  • Sleep aid
  • Sleep notes
  • Wake-up mood
  • Wake-up weather report
  • Heart rate tracking
  • Philips Hue integration
  • Runkeeper integration
  • More alarm sounds

Upgrade to Premium in the Sleep Cycle app under: Settings -> Premium

Subscriptions are handled by Apple. Follow the steps below to view, change, or cancel your subscriptions from your iPhone, iPad, or iPod touch, or your computer.

On your iPhone, iPad, or iPod touch:

  1. On the Home screen, tap Settings.
  2. Tap iTunes and App Store.
  3. Tap your Apple ID.
  4. View Apple ID. You might need to sign in.
  5. Under Subscriptions, tap Manage. If you don’t see a subscription in iTunes and are still being charged, make sure that you’re signed in with the correct Apple ID.
  6. Tap the subscription that you want to manage.
  7. Use the options to manage your subscription. You can choose a different subscription period, or turn off Automatic Renewal.

Turn off Automatic Renewal to cancel a subscription. Your subscription will stop at the end of the current billing cycle. 

On you Mac or PC:

  1. Open iTunes.
  2. Click Sign in and enter your Apple ID.
  3. Click your name, and select Account info from the drop-down menu.
  4. Enter your password again.

On the account information screen: 

  1. Scroll to the Settings section.
  2. To the right of Subscriptions, click Manage. If you don’t see a subscription in iTunes and are still being charged, make sure that you’re signed in with the correct Apple ID.
  3. Choose the subscription you want to manage.
  4. Use the options to manage your subscription. You can choose a different subscription period, or turn off Automatic Renewal.

Turn off Automatic Renewal to cancel a subscription. Your subscription will stop at the end of the current billing cycle. 

Online backup let’s you sync your sleep cycle data seamlessly to the cloud and between devices. With Online backup you can change, restore or upgrade your device without having to worry about losing your Sleep Cycle data.

In addition, you also get access to the web interface where you can look at bigger graphs, export your data, see quick stats and more.

Some of the graphs currently available in addition to the standard ones found in the app are:

  • Went to bed per day of the week
  • Time in bed per day of the week
  • Time in bed vs Went to bed
  • Sleep note usage

More graphs and feature will be added continually.

Make sure the camera permission is On.
Go to iOS Settings> Privacy> Camera and turn On permission for Sleep Cycle.

Sleep notes:

With Sleep notes you can find correlations between your sleep patterns and daily activities.

Under the tab Settings, go to Sleep notes and change the settings to On. From there you can also change the default Sleep Notes by choosing “Edit sleep notes”. Sleep cycle will now each night ask you to input your sleep notes, when starting the alarm before going to sleep. And you will be asked to enter your Wake up mood in the morning when you wake up.

Wake up mood:

Under the tab Settings, go to Wake-up mood and change the settings to On.

Upon wake-up and straight after the alarm has been turned off, you will be asked to document their wake-up mood. This functions lets you find correlations between your sleep quality and your wake-up mood.

Under the tab Settings, go to Heart rate and change the settings to On.

Users who activate heart rate reading will be asked to place their finger on the camera lens to record their wake-up resting pulse. Their heart rate will then be included in their sleep analysis graphs.

Under the tab Settings, go to Sleep aid and change the settings to On.

If you have an iPhone 5S or later, the phone measures your activity during the day automatically. Activity is your amount of steps since your last sleep session.

You do not have to keep the app running to measure steps, the phone does this automatically. If you do not want the phone to measure this please go to:

iOS Settings -> Privacy -> Motion Activity

No. Runkeeper integration works only if Sleep Cycle is used without Airplane mode.

During sleep

Sleep Cycle works well for two persons sharing bed using microphone motion detection. Sound decays exponentially with distance, this means that sounds generated by your partner will have a much lower volume than sounds generated by you.
In addition to this, If both users use Sleep Cycle then the two devices will automatically connect to each other over Wi-Fi. Sleep Cycle can then detect where in bed a sound originates from with an accuracy of 30 cm (1 feet), translating the analysis into an extremely accurate sleep analysis for both users.

Yes, it will. You will have to unlock it to turn off the alarm.

If both you and your partner use Sleep Cycle with the microphone as the motion detector, the two installations will automatically link both phones to each other over Wi-Fi and the name of the other device is shown on the night screen.

Using this link-technology we can detect where in bed a sound originates with an accuracy of 30 cm (1 feet).

Sleep Cycle will work great even without linking the two devices.

In order to use link, your phone will need to be connected to the same Wi-Fi network.

Sleep Cycle will work on all types of matresses. Sleep Cycle sound analysis technology tracks the sound of your movement in bed and filters out unrelated sounds and white noise.

There is no need to reset the alarm if you get out of bed for a short while during night. Sleep Cycle will not detect movement if you are not there, so keep this in mind when reading your graph in the morning.

We do not recommend using Sleep Cycle without a charger connected. Sleep Cycle uses at average 30% of the battery during one night, sometimes more sometimes less. If you do not charge your device during the night it risks running out of battery before the morning.

You can activate battery warning under the tab ‘Settings’ to enable Sleep Cycle to warn you if you’re running out of battery, but we still recommend setting a back-up alarm if you wish to sleep without the charger connected.

Sleep Cycle needs at least two nights to adapt and calibrate to your movement patterns. Therefore, it is common for Sleep Cycle to wake you up at the end of your alarm-window for the first 3-4 nights when you start using Sleep Cycle.

You can also have a look at the sleep graphs to see if your phone is picking up your movements correctly.

Your device should not heat up exponentially during night.

Make sure you do not cover it with thick material, and that your Sleep Cycle and iOS versions are updated.

Sleep Cycle needs one, sometimes two, nights to calibrate to your accelerometer. Usually the calibration is not needed but on some (very few) devices the accelerometer is too sensitive and can detect movement when there was none during the first one or two nights. If you place your iPhone/iPod in bed, according to the instructions, then this is not a problem.

When calibrated, Sleep Cycle is extremely sensitive to movement. It can detect the slightest vibrations. For example, you walking past the iPhone/iPad or a car/truck passing by on the street outside.

When you place your iPhone/iPad on a flat surface then Sleep Cycle detects very little movement. It then assumes that the users movements are very difficult to detect and goes into a mode where every movement is treated very seriously (and creates a big spike in the graph).

If you still feel Sleep Cycle creates inaccurate graphs, please do not hesitate to contact us. We’ll analyze your data and check if you have discovered an issue with the Sleep Cycle movement-detecting code.


Yes. We support devices with iOS8 or later, including iPod Touch fifth generation or later and iPad second generation or later.


The Sleep Cycle volume is independent of the iOS volume. Sleep Cycle will sound even if your iPhone is muted, you’ve turned off the volume, or if you’re using “Do not disturb”.

The volume under Sleep Cycle settings will define the starting volume of the alarm. After about 1,5 minutes the volume will increased automatically until maximum volume is reached.


1. Set an alarm.

2. Start your music or podcast.

Yes. The option can be found at the bottom of Sound in Settings.

Yes. The alarm will sound in the morning even if the device is muted.

We recommend disconnecting your headset when running an alarm.

If you are using your headphones, the alarm will sound though the headset in the morning. This function was implemented in version 4.1, to ensure people with reduced hearing can connect external speakers with a cable, dock or Airplay (only available when using motion detection accelerometer).

Yes, activate support for Airplay (only available when using motion detection accelerometer) under Settings > Airplay.

Contact us

Note that we receive a lot of e-mail and sometimes it takes up to a week before we answer support e-mail. We read all comments, suggestions and feature requests but can not guarantee to reply all of them.

Please do contact us here.

Unsolicited Idea Submission Policy.



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