I tried wearing a fitbit for about a year but I work outside in a hot climate and it kept dying from baking in the heat all day. Sent two of them in for warranty replacements until I finally gave up on it and sold the last replacement I got on ebay. I definitely would be willing to try a ring though, assuming it could hold up better.
Because then the owner can’t advertise a lower price for the food and then sneak in the hidden “service fee” at the end.