You are using an outdated browser. Please
upgrade your browser to improve your experience.
When to Sleep
When to Sleep
When to Sleep counts sleep cycles and tells you when you should fall asleep. Waking up in the middle of a sleep cycle leaves you feeling tired and groggy, but waking up in between cycles wakes you up feeling refreshed and alert.When to sleep uses the average times for calculations and suggest best 4 times for you.
Features