Learn how we help you optimize your sleep for better health
Sleep Calculator helps you find the perfect bedtime and wake-up time based on your natural sleep cycles. We use the science of 90-minute sleep cycles to ensure you wake up feeling refreshed and energized.
Your sleep happens in 90-minute cycles. Each cycle includes light sleep, deep sleep, and REM sleep.
We calculate when you should sleep to wake up at the end of a complete cycle.
Wake up feeling refreshed instead of groggy by timing your sleep correctly.
Lo-fi piano, guitar, and strings to help you relax.
Easy on the eyes for nighttime use.
Works perfectly on all devices.
Share your sleep schedule with friends.