Earlier quoted context omitted.
>to a device that tracks it all the time There is the problem with hand devices and quality of measurements they do Article describe it more properly If you have heart problems and you need some measurements there are a lot of medical _calibrated_ devices for that There are 0 devices for that which has only hand wearable part Also consider such cases when such devices can do a lot of harm https://www.theguardian.com/…
You keep moving the goalposts. First you claimed they weren’t useful. Now they’re simply inaccurate (somewhat valid, but see below) and when used stupidly can be privacy problems. I can’t argue the latter, but that’s not just a smart watch problem. Regarding accuracy, though, the Apple Watch is very accurate for heart rate, which is important because it can alert the wearer to dangerous heart conditions. It’s also be…
Not useful - because algorithms for caloric expenditure are usable now only for group level experiments
>that’s not just a smart watch problem
True
https://www.mdpi.com/2075-4426/7/2/3/htm#jpm-07-00003-f003
>Overall, heart rate error was within the acceptable error range for the majority of task/device combinations, but EE error exceeded the allowed threshold for all tasks and devices.
And I repeat - for group level experiments such devices are good
For individual, without calibration - not
https://www.mdpi.com/2075-4426/7/2/3/htm#fig_body_display_jp...
You can see this on Fig2. That individual dots on image - that may be error on your device on your body
And even more - I do not know what for you need your pulse measurements. Even accurate
You do not need that number when you reach your peak velocity and do not need it when your sitting
>It’s also best-in-class accurate for calorie expenditure, which is fine for general day-to-day tracking and dietary planning.
I know even more accurate device for such purpose
Scales
And btw - scales can be mechanical so they can't send your data