Sleep calculators
Deterministic tools, no AI involved: the same arithmetic and guidelines used in sleep research, applied to your own schedule.
Sleep cycle calculator
Find the bedtime or wake time that respects complete 90-minute sleep cycles.
Chronotype test
Ten questions to find out whether your natural rhythm leans morning, evening, or in between.
Sleep debt calculator
Add up how much sleep you owe yourself this week compared to what’s recommended for your age.
Jet lag planner
A day-by-day plan to shift your internal clock before and after a flight.