I’m sure @marco_alt can provide objective data supporting my subjective opinion
I got my H10 mid June, prior to that I used the camera. As you can see in the screenshot of my rMSSD readings, the earlier readings are considerably more variant than the later. Without having access to the raw data readings, my guess is that the algorithm has some trouble identifying the variations of blood flow in my finger tips correctly.
And yes, I’m totally stressed out from work and family issues, hence the alarmingly low values. I am trying to get back on track though.