Originally Posted by DrIsotope

For fitness purposes, any name-brand HRM will perform adequately. Accuracy/precision will be (mostly) the same for most all of them-- shopping is done based on things like cost, battery life, convenience, etc.

I wear an Apple Watch all the time, and it is my only tracker for runs/walks/hikes, only using a chest strap / computer combo for bike rides. It works perfectly well, and is perhaps more useful as it can
show HR trends over full days, providing a better picture of how tired/rested I am.