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Unfortunately, it does seem true that most of sleep monitoring devices are not very good (I'm hopeful for the head-mounted ones, but I don't have any data).

But the advice at the end of your post... I'm trying to put it politely - it's insulting rubbish for anyone with moderate to severe sleep issues.

Correct advice, in the absence of actual REM tracking devices, is to go to the doctor - sleep specialist and possibly also a psychiatrist.

A large percentage of the population has sleep issues, suggesting they try the basics is actually very good advice. Much like tech support asking you to restart the device, which verifies it’s plugged in and a host of other issues.

If that’s not working then get a full on sleep study, otherwise save your time and money.

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