Wake Up Refreshed
Calculate your optimal sleep cycles for better rest
Optimal Wake Times
Sleep Cycle Timeline
Why these times?
Sleep occurs in cycles of approximately 90 minutes. Waking up at the end of a cycle (rather than in the middle) helps you feel more refreshed and alert. These times are calculated based on complete sleep cycles, accounting for the time it takes you to fall asleep.
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Why Sleep Cycles Matter
Your sleep follows a natural rhythm of 90-minute cycles, alternating between light sleep, deep sleep, and REM (dream) sleep. Waking up at the end of a cycle helps you feel refreshed, while waking mid-cycle often causes grogginess.
Light Sleep
Easy to wake from, accounts for ~50% of sleep
Deep Sleep
Physical recovery happens, hard to wake from
REM Sleep
Dreams occur, memory consolidation happens