sleep cycle
Wake refreshed, not groggy.
to wake at 7:00 AM, fall asleep by:
| cycles | hours | bedtime |
|---|---|---|
| 8 | 12.0 | 6:46 PM |
| 7 | 10.5 | 8:16 PM |
| 6 | 9.0 | 9:46 PM |
| 5 | 7.5 | 11:16 PM |
| 4 | 6.0 | 12:46 AM |
| 3 | 4.5 | 2:16 AM |
How it works
- Adults cycle through sleep stages every ~90 minutes. Waking at the end of a cycle feels better.
- Adds a 14-minute average fall-asleep buffer to the math.
- Reverse mode: if you went to sleep now, here are the best wake times.