Wake up refreshed by timing your alarm to complete 90-minute sleep cycles — or find the ideal bedtime for a target wake time.
Each sleep cycle is ~90 minutes. Waking mid-cycle causes grogginess.
Pick from 5 to 6 full cycles with realistic bedtime options.
Accounts for the 10-20 minutes it takes to fall asleep.
Plan from bedtime or from wake time, whichever you need.
Sleep quality pairs with diet, hydration and activity trackers.