Apple Watch blood oxygen feature returns: Stunning update rolls out with iOS 18.6.1 and watchOS 11.6.1. How can you access it?

Apple will introduce a redesigned Blood Oxygen feature for some Apple Watch Series 9, Series 10, and Apple Watch Ultra 2 users through an iPhone and Apple Watch software update, the tech giant said on Thursday. The feature typically allows users to see a readout of their blood oxygen level right on the Apple Watch.