I don't think the apple watch is as accurate as they claim, and it seems to need many nights of data to make a sleep apnea decision, so in that respect it is vastly inferior to polysomnography. But hey, if it helps more people seek a proper diagnosis, then I'm all for it. Sleep apnea sucks. It seriously ruins lives.
Also: SpO2 is less useful here than you might think. Most at-home sensors are pretty unreliable, and it's possible to have sleep disordered breathing without having significant desaturation.
Well if you already have an Apple Watch and don’t want to spend the night plus potential sleep study cost (can be above $1000 for a lot of people), then this may help someone. Especially if they don’t even know.
I have sleep apnea and used Lofta’s service for $187 and paid for the machine out of pocket. So there is definitely a need for this type of testing.
Also: SpO2 is less useful here than you might think. Most at-home sensors are pretty unreliable, and it's possible to have sleep disordered breathing without having significant desaturation.