[wvl]

This matches my experience having received one Nov 2018 (and returning it a few weeks later). It was constantly getting my actual sleep times wrong, more often than not marking me as being asleep while watching tv in the evening.

After contacting support, their solution was an upcoming update to their app where I'd be able to edit the data so that I could override the app whenever I knew it was wrong. Which completely invalidates the primary reason to own this product. I mean, if I knew when I was asleep, why would I need a ring to track it?!

So given that it couldn't properly track sleep, doesn't track activity (by design), the only other purpose in my mind was to track HRV. And count me as skeptical of the accuracy of that data as well.