Zoomable sleep-cycle chart
What happens while you sleep
A typical night for a healthy adult, cycling through light, deep and REM sleep about every 90 minutes. Tap the dots to learn each stage. Pinch or Ctrl+scroll to zoom.
Tap a dot · pinch or Ctrl+scroll to zoom · drag to pan
Sleep cycles
N1: drifting off
The first few minutes: light sleep, slow eye movements, sometimes that falling feeling. Easy to wake from.
Schematic hypnogram. Real nights vary from person to person and night to night.
Interactive breathing
Breathe with Luna
Follow the circle. Slow breathing is a simple way to wind down. Pick a pattern; we remember your favourite on this device.
Ready
Stop if you feel dizzy. Breathe normally if any pattern feels uncomfortable.
Sleep calculator
When should I go to bed?
Set your wake-up time. We count back in 90-minute cycles plus about 15 minutes to fall asleep. Saved on this device.
A rule of thumb, not a prescription. Most adults need 7–9 hours.
