90 Minutes (FREE)

The average sleep cycles are 90 minutes long. Sleeping in 90 minute increments will help you sleep efficiently and allow you wake up feeling refreshed, but waking up in middle of the cycle will likely to make you groggy.


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Research has shown that sleep is prompted by natural cycles of brain activity and consists of two basic states: rapid eye movement (REM) sleep and non-rapid eye movement sleep. Each cycle lasts about 90 minutes. A healthy person needs about 5 to 6 cycles a night.

A person waking up at the end of a complete cycle will feel refreshed even though the amount of sleep is short. On the other hand, waking up in the middle of the cycle will leave you feeling groggy and restless.

You can improve your sleeping habits and get better sleeps by planning the sleep time as well as wake up with this app.

Easy to use, simple interface and effortless alarm settings.

*** Features ***

★ Easy to use interface
★ Effortless alarm setting
★ Auto calculate the range of best times to sleep
★ Auto calculate the best time to sleep
★ No hassle settings


*** Use direction ***

- Tap on the time to change the next time period.
- Swipe right to use the sleep time function
- Swipe left to use the wake up time function


Keywords: Sleep, sleepy, alarm, clock, triphasic sleep, good night, REM, training, self-improvement, habits, calculator, relax, time management, time, hourly