Sleep and time tools
Choose a tool for tonight, the full week, a shift, a nap or caffeine timing. Everything runs in your browser without an account.
Core tool
Open tool →Sleep cycle calculator
Work out bedtime or wake-up options for one night.
Planning tool
Open tool →Seven-day sleep planner
Compare weekday and weekend wake anchors across a full week.
Shift work
Open tool →Shift work planner
Compare a sleep window before the shift with recovery sleep after it.
Short sleep
Open tool →Nap calculator
Plan a 20, 30, 60 or 90-minute nap with a clear end time.
Timing tool
Open tool →Caffeine cutoff calculator
Estimate caffeine remaining at bedtime and a cutoff time.
Shift work guides
Use the planner first, then read the practical guides for night shifts, long shifts and rotating schedules.