Trusted by millions in the US and UK to optimize sleep. Calculate your perfect bedtime today.
Get StartedUses 90-minute sleep cycle algorithms, endorsed by sleep experts (CDC, NHS).
Join users across the US and UK who wake up refreshed in just weeks.
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Over 30% of US and UK adults report poor sleep (CDC/NHS). Our calculator aligns your bedtime with natural cycles to reduce fatigue and boost energy.
Enter your wake-up time (US: AM/PM, UK: 24-hour) to find optimal bedtimes based on 90-minute sleep cycles. Works with any timezone (e.g., EST, PST, GMT).
Explore expert advice tailored for US and UK audiences.