It's amazing. Dennis doesn't know a thing about SpO2 readings but he suddenly knows everything to know about blood oximeter readings and testing. Of course, he is lying. Again. is there anything Dennis will not lower himself to not lie about when Apple is involved?
I'd bet not. The fingertip oximeter is going to be in constant, direct contact with a smooth skin surface over a very vascular area.
The watch is on a strap that's going to have a permit a varying range of contact depending on how tight the user wears it, and over an area that's not nearly as vascular and might or might not be covered with hair.
We don't have any metric on the watch accuracy yet so it's all speculation at this point, but the fingertip meter is going to have the advantage of much better test conditions.
How is that crappy watch going to read blood O2 levels? Where are the sensors in it? The watch can prolly function as a dumb display for an external pulse oximter. But due to the anality at Apple I doubt there are any places to plug in things. So the next step is an external pulse oximeter that blue tooth connects to the CRApple watch