Planner Settings
Average time it takes you to fall asleep once in bed.
Standard cycle is 90 mins, but can range from 75 to 110 mins.
Dream Soundscapes
Synthesize ambient sleep sounds natively using the Web Audio API.
Saved Routines
Click any saved routine to load its inputs instantly.
Recommended Schedules
* Hover or tap any recommendation card to update the interactive sleep journey hypnogram details below. Waking up at the end of a cycle avoids sleep inertia (waking grogginess).
Sleep Cycle Journey
Interactive hypnogram modeling your physiological sleep stages over time.
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Sleep Cycle Science
NREM (Light)
Stages N1 & N2. Heart rate slows and muscles relax. Makes up ~50% of the night. Important for transitioning to deeper states.
NREM (Deep)
Stage N3. Slow-wave sleep. Heart rate and blood pressure are at their lowest. Essential for cellular repair and physical recovery.
REM Sleep
Rapid Eye Movement. Dreams occur. Brain activity mimics wakefulness. Crucial for memory consolidation, learning, and emotional processing.