How does smart watch measure stress?
In: Technology
They basically use heart rate and movement, which you can tell is very inaccurate, which is why a lot of the premium watches don’t have functions like that on default, because of how inaccurate it is.
Cheaper manufacturers like to pack their products with a lot of features to claim it can do a lot, while most of it is very unscientific or untested/non certified
It is a mix of heart rate and the gyroscopes measuring how much your hands are shaking. If there is something where you can count caffeine intake, it takes that into account too
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