[rm445]

Once you give up sleep tracking as a feature, it doesn't matter too much as people can charge their watch nightly.

I'm very much on the other side of that decision - I find sleep tracking to be a killer feature, but you can see how Apple got away with it.

[layer8]

From my research, none of the available sleep tracking solutions are reliable, unless you attach electrodes to your head. When using multiple sleep tracking solutions in parallel, they all report significantly different results.

[mbirth]

Yes. Simply sleeping on the arm where you wear your watch will make it record crazy values.

The sleep quality and breathing measurements are based on movement - which doesn’t make sense when you have another person or pet with you in the bed that also tends to move at night.

That’s why we still have sleeping labs. However, the watch’s data can be an indicator that something is wrong and get people to at least mention it to their doc.

[mbirth]

I’ve got a charger for my Apple Watch on my desk. I charge my watch in the evening while I’m doing stuff on the computer. When it’s bedtime, the watch is at 100% - ready for sleep tracking and the next day.