@phoneboy ah, our needs differ. i am wearing a Fitbit Charge 4 that i picked up for $100 (Fitbit were running a sale) to replace how i used a Fitbit One for the last decade or so, for tracking more incidental motion. you want to use it to drive a run through heartrate. i have a Garmin watch & chest strap i can use for that.
for me, the Charge 4 replaced the Garmin + One combo for my everyday wear, and it is better for sleep tracking than the One ever was. and at $100, it was a good price.
(my wife has the Alta HR and is also not using it for runs but for everyday wear.)
// @matigo