diagnosed with a sleep disorder I think this is a great future market. It's quite unfortunate that, although the Apple watch has a pulse oximeter in it, the fu

diagnosed with a sleep disorder I think this is a great future market. It's quite unfortunate that, although the Apple watch has a pulse oximeter in it, the functionality is currently disabled. Reportedly because it would then be a medical device in the eyes of the FDA. Good sleep tracking, just that one function, could conceivably sell millions of units.