Does anyone understand how does it work and what insights can we get from it?
Sometimes it looks like is "always on" but other times when I access it, it asks me to wait 30 seconds "keeping still", and sometimes gives me result "Check Watch Fit"...
I'm really not convinced by this. I use an app HRV for Fitness to measure HRV every morning on waking. But this is some sort of arbitrary number and mine is almost never "rest" blue even when sleeping, it averages about 20 minutes per day max. It doesn't appear to learn your ranges and use those its just "under 30" etc. My husband on the other hand is basically so not stressed I am surprised he is actually alive as his is rarely ever out of the blue and says it shows him less stressed during work hours than when hanging out at home. Therefore, still keep looking at it but not sure if it's useful information.