I always wondered what would get Fitbit to agitate its saturated market and with the advent of Covid-19 now was the time to have had masses of activity trackers everywhere measuring temperature differentials and respiration for early alerts of illness. I remember when I was hospitalised about 3 years back my Fitbit did show a rise in resting heart rate but I only saw that after I recovered.
If activity trackers were now to incorporate temperature, respiratory, and other sensors I reckon they are looking at massive sales.
I've just ordered an Oura Ring that I'm planning to use to monitor my various bio-hackable stats. More on that later in next week.