How ZzzTimer Works
Sleep Cycles
ZzzTimer calculates optimal sleep times based on the average length of a human sleep cycle, which is approximately 90 minutes.
Calculating Bedtimes
When you input a wake-up time, ZzzTimer suggests bedtimes that allow you to complete full sleep cycles, helping you wake up feeling more refreshed.
Calculating Wake Times
If you input a bedtime, ZzzTimer suggests wake-up times that coincide with the end of a sleep cycle, potentially making it easier for you to wake up.