yuan li

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Sleep CalculatorFind your optimal wake-up time using 90-min sleep cycles
May 2026

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Joined Product HuntJune 1st, 2025

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8h ago

Sleep Calculator - Find your optimal wake-up time using 90-min sleep cycles

Science-based sleep calculator using 90-minute sleep cycles. Instantly find your optimal wake-up time and wake up refreshed. Free, no sign-up required.