The fact that nothing does this makes me wonder how it would be possible apple could be first. Surely if it was possible to do accurately, some other company would have released something.
What they usually do is find a small company with some compelling technology and then either fund it to gain exclusive or privileged access, or buy it outright. The story here (that a small company working on cutting edge sensors has close links with Apple) fits that pattern perfectly.
Sure, maybe apple is first this time but I have a hard time believing Apple is at the cutting edge of new medical technology.
I don’t know about how innovative these rumored sensors may to comparatively, though.