

Improving your sleep hygiene: If you can’t squeeze in any more sleep, focus on your sleep hygiene.Sleeping in a little later: Keep this to an hour or two to avoid disrupting your circadian rhythm too much.Taking a nap: Check RISE for the best time to nap to stop daytime sleep affecting your nights.To reduce how much fatigue you feel - both overall and during the afternoon slump - lower your sleep debt. While you might always feel that afternoon slump in energy, you’ll feel it even more after a night of sleep deprivation or when your sleep debt is high. We measure this over your last 14 nights and recommend you keep it below five hours to feel and function at your best. The app can then work out how much sleep debt you’re carrying.

RISE uses historical phone use data and proprietary sleep-science-based models to calculate your sleep need down to the minute. To find out your exact number, turn to the RISE app.


One study suggests the average sleep need is 8 hours 40 minutes, plus or minus 10 minutes or so, but 13.5% of the population may need 9 hours or more sleep a night. It’s measured against your sleep need, which is the genetically determined amount of sleep you need each night. Sleep debt is the running total of how much sleep you owe your body. The RISE app can work out how much sleep debt you have.
