Stress is literally a giant guess.

It is the exact same “technology” that mood rings work off of. Essentially a wild guess based off of skin temperature.

There are many biological things we can measure. One smart watch is even getting FDA approval for blood pressure monitoring by the time difference between the electrical and pressure wave, cool stuff.

But instead, smart watch providers push complete bullshit wild guesswork “features” in order to gamify yourself like a tomogachi