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.