Apple Reinstates Blood Oxygen on US Watch Models After Patent Ban

Apple has reinstated blood oxygen tracking on U.S. Apple Watch Series 9, 10, and Ultra 2 models after an 18-month ban from a patent dispute with Masimo. The feature returns via iOS 18.6.1 and watchOS 11.6.1 updates, shifting processing to the iPhone to avoid infringement. This move highlights Apple's innovative agility in health tech amid ongoing legal battles.