Calculate exact sleep cycles to wake up feeling refreshed instead of groggy.
A typical sleep cycle lasts about 90 minutes. Waking up in the middle of a cycle leaves you tired.
Waking up feeling groggy is often a result of being woken during a deep sleep stage. Human sleep naturally occurs in 90-minute cycles. By timing your alarm to the end of a cycle, you can wake up feeling refreshed and alert.
The **BmiOtic Sleep Calculator** factors in the average 15 minutes it takes to fall asleep, giving you precise windows to target high-quality, restorative rest.
To improve sleep quality, avoid blue light (phones/laptops) at least 60 minutes before bed. A dark, cool room is the ideal environment for deep rest.