[Dave_Rosenthal]

Is this satire? If not, here's some:

From a quick search it appears that subcutaneous fat can adversely affect the accuracy of an optical pulse oximeter. It sounds like everyone with a large BMI should get a class action going too.

For that matter, I can't believe that the GPS in the Apple Watch, which is marketed as accurate by a trillion dollar company, works worse for people living in dense urban areas. Another clear case of bias against the urban poor while billionaires living on their ranches in Montana with an open view of the sky enjoy perfect GPS.