this post was submitted on 22 Jul 2023
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I've got a Mi Band 6 and I think it guesses based on activity half the time. I just sat still and shook mine about, and it reckoned I was well over 120bpm, but manually checking and it's barely over 1 beat a second. Being half or double what it should be seems pretty common.
It could be because I've got hairy monkey arms, but my wife also found it to be poor with her old FitBit (which has shockingly bad phone connectivity instead) keeping much better track of it during exercise.
It's nothing vitally important, but you probably shouldn't use it for any actual athlete stuff.
Interesting. I mean there are random spikes that are much higher than before and after, but those are only once or twice a day and I assumed those were just wrong measurements anyway.
Thing is it does have my heart rate going up a lot when I'm at the gym, even when I'm not doing anything with my arms, it could detect as activity, so I assume it at least somewhat accurately measures heart rate.
You are of course right, I don't expect Apple watch accuracy from a band for such a low price.