What is a sleep cycle

What is a sleep cycle

I believe there are still many friends who don’t understand what the sleep cycle is. Here is a simple breakdown of what is called a sleep cycle and how it works.

How Sleep Cycle works

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.

Stages of sleep

During sleep, you usually go through five stages of sleep. Simplified, stages 1-2 are light sleep, 3-4 deep sleep, and the fifth stage is REM sleep, also referred to as rapid eye movement sleep. The dream state.

The first is light sleep and in this stage, you drift in and out of sleep. Your eyes move slowly, your muscle activity is slow, and you would be easy to wake up.

In the second stage, your body starts preparing for deep sleep. Eye movements and brain waves slow down, your body temperature drops, and your heart rate slows down.

Entering the third stage, you are now in deep sleep. Extremely slow brain waves called delta waves are intermixed with smaller, faster brain waves.

In stage four, you stay in deep sleep and your brain almost exclusively produces the slow delta waves, guiding you towards the fifth stage.

Entering the last stage, stage five, also called REM sleep. Now your eyes are closed but move rapidly from side-to-side, due to the intense dream and brain activity you go through in this stage.

Sleep Cycle alarm clock

Your movements vary with each sleep stage. Sleep Cycle uses sound analysis to identify sleep states, tracking your movements in bed. 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 stage (stage 1-2).

Instructions: Placement

Sleep Cycle has two motion detection modes. You can change modes under Settings > Motion detection (if Alarm is turned On in Settings). Microphone: 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 on the phone. Picking up the phone will also 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.

Leave a Reply

Your email address will not be published. Required fields are marked *

Share via
Copy link
Powered by Social Snap