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The tools you need,
ready when you are.

From nap timers and sleep calculators
to earphone tests and study clocks.

Explore all tools Open timer
20:00Open a 20-minute timerNap timer Set a duration, check your earphones, and start. Time available Rest planNap calculator Plan your rest and wake-up time, including time to fall asleep. LRLeft/right channel test Listen and check that the left and right channels match.

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All tools

Rest, audio, study and print tools in one place.

Timers

Nap timerA short break of your own, from 1 to 180 minutes.

Nap & sleep calculators

Nap calculatorCompare short naps and longer rests for the time you have.Sleep cycle calculatorEstimate a sleep schedule from your wake-up time or the current time.Coffee nap calculatorCalculate the end of a short rest from the time you drink coffee.

Earphone tests

Earphone testsConnect your earphones and lower the volume before starting.Sound leakage testCompare baseline noise and test sound using the microphone.Left/right channel testListen to check the left, center and right channels.Alarm volume setupStart quietly and choose a comfortable alarm volume.Bluetooth delay & interruption testTap along to a beat to estimate perceived delay.

Study & exams

Korean CSAT countdownSee the time until the exam in Korea Standard Time.Full-screen study clockDisplay a clock, stopwatch or countdown in large digits.Pomodoro TimerAlternate focus and breaks, with optional naps during rest.

Printable cards

Resting desk cardPrint your wake-up time and a message on a desk card.Roommate rules cardPut alarm, sound and lights-out rules on one A5 card.

More

Nap cultures around the worldExplore words for naps and ways of resting in five regions.Timer widget builderCreate a small timer for your blog or Notion page.