Sleep better with Somnina
Enter your wake time or bedtime to get optimal windows (~90-minute cycles). No smartwatch needed.
Sleep Facts
Sleep cycles
Your sleep runs in ~90-minute cycles across light, deep, and REM phases. Waking near the end of a cycle helps you feel refreshed.
Adults need 7-9 hours
That's about 4-6 complete cycles for most adults. Consistency matters more than perfection.
Blue light matters
Evening screens suppress melatonin. Aim to reduce bright light 1-2 hours before bed.
Sleep Statistics
33%
of adults sleep too little regularly
90
average length of one sleep cycle (min)
5–6
complete sleep cycles recommended nightly
33%
boost in cognition with adequate sleep