Sleep Cycle Calculator
Instant bedtimes based on 90-min cycles. Two modes: wake-up target or sleep now.
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Sleep Calculator Pro
9 science-backed sleep tools — open and ready to use.
Circadian Rhythm Engine
Interactive 24h ring mapping cortisol, melatonin, energy, and workout windows.
Hover a ring segment to learn about each phase
☀️
06:00
Cortisol
🧠
10:00
Alertness
⚡
14:00
Reaction
💪
17:00
Workout
🌙
21:00
Melatonin
💤
23:00
Sleep
Chronotype Assessment
10-question quiz to discover Early Bird, Middle, Night Owl or Light Sleeper.
Question 1 of 10
0/10 answered
Sleep Score
0–100 composite index across Duration, Consistency, Circadian Alignment, and Debt.
7h
3/7
23:00
1h
AI Sleep Coach
Personalized daily schedule: bedtime, coffee cutoff, workout, screen curfew, and more.
2
Sleep Debt Tracker
Weekly log with cumulative deficit and a step-by-step recovery plan.
8h
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Children's Calculator
Age-appropriate sleep durations, bedtimes, and wake windows for newborns–teens.
Senior Sleep Calculator
Circadian-adjusted recommendations for 60+, including nap guidance.
Health Impact Dashboard
Visual science: how sleep affects immunity, heart, memory, hormones, weight, mood.
7h