I wear my Apple Watch every night while I sleep, and I have found it’s been helping me sleep better.
My watch sends a ton of information to my phone during the day, including information about how I am sleeping. When I wake in the morning, I head over to the Sleep summary in the Health app on my iPhone and check how I did that night. Here’s an example:
You can see this was a pretty good night for me. I slept for 7 hours, and I managed to get in a fairly decent amount (for me) of deep sleep. I don’t know if this is typical for most people, but it is for me. I have a number of deep sleep periods, about 4 periods of REM sleep, and the rest is core sleep. You can see I woke up twice, but barely for any time at all. I also found I was refreshed and alert the next morning.
That wasn’t typical though. If you look below, you see my sleep for the week:
There’s quite a number of days where I was awake for large periods of time. Every day I would wake up and see that and think: what can I do to fix that? Some days it would be something simple, like the room was too warm. Or I ate too late. Other days it is due to more difficult things like too much stress. (Stressful days tend to cause other issues, like eating badly, which compounds the problem.)
Before I had this data, I would let myself sleep badly for a long stretch of time. Now when I start seeing I am not getting enough sleep, I work hard to get the right conditions to get a better sleep the next night.
There are plenty of things you can do to maintain good health: eat well, exercise, and sleep well. The Apple Watch can help with all of those things. If you can get one with these features, I highly recommend it.
P.S. Why is deep sleep important? It could be the time your brain gets cleaned. To see what I mean, go here.