It is recommended to wake up at the end of a sleep cycle. Sleep Time helps you to calculate when to wake up or fall asleep to sleep efficiently and wake up feeling great. Features: - Simple material design build for speed and efficiency - Calculate when to wake up if you go to sleep now or at a certain time - Calculate when to sleep if you want to wake up at a time - Notifications for when to wake up or go to sleep - Factor in time to fall asleep in calculations If you have any feedback or bug report, please contact me using Feedback tab in the app drawer.