Wake at the end of a cycle
😴 Sleep Cycles
Sleep runs in cycles of about 90 minutes, and waking mid-cycle leaves you groggy. Enter when you must wake up or when you go to bed, and get the best times, fall-asleep time counted.
Fall-asleep15′
Cycle length varies 80–100 minutes per person; 90 is the average. 5–6 full cycles (7.5–9 h) suits most adults. If one suggestion feels wrong, shift by ±15 minutes over a few nights and note when mornings feel easiest.