Buying one also probably also pre-supposes that you care--at least in principle. I agree it can be a useful nudge. I have friends who totally swear by their FitBits. And that's great.
Personally, I'm fairly active--at least at a walking level of activity day to day--and quantifying the number of steps I take or whatever just doesn't really do anything for me.
But I'm a big believer in nudges generally and I expect that, over time, we'll see more and more data that is more directly actionable. I just don't really see it (for me) today.
Yup, makes sense! And you may want to take a fresh look at them, because now it's a lot more than steps (rem measurements, heart rate, blood oxygen level, perspiration, temperature, etc).
Personally, I'm fairly active--at least at a walking level of activity day to day--and quantifying the number of steps I take or whatever just doesn't really do anything for me.
But I'm a big believer in nudges generally and I expect that, over time, we'll see more and more data that is more directly actionable. I just don't really see it (for me) today.