How do I use this tool?

Simply start using the tool. No registration required, everything works in your browser.

No, all data stays locally on your device. We do not store or track any personal information.

Does it work offline?

Yes, once the page loads, the tool works completely offline.

Classic bedtime utility for optimal sleep cycles

I want to sleep at

HoursMinutes

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Sleep Cycles: Each complete sleep cycle lasts 90 minutes. Waking up between cycles (not during deep sleep) makes you feel more refreshed.

Fall Asleep Time: Most people take about 15 minutes to fall asleep after getting into bed.

Optimal Sleep: 5 cycles (7.5 hours) is ideal for most adults. Some need 4 cycles (6h), others 6 cycles (9h).

Classic & Simple: No wellness gimmicks. Just proven sleep science from the Nokia phone era.

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Consistency is key. Try to maintain the same sleep and wake times every day, even on weekends. Your body's circadian rhythm will thank you.