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Apple Reintroduces Blood Oxygen Feature Ahead of Apple Watch Series 11 Launch

The redesigned Blood Oxygen feature shifts measurement to the paired iPhone and is available on select Apple Watch models after a patent dispute and import ban, Apple said.

  • On Thursday, Apple Inc. will release iOS 18.6.1 and watchOS 11.6.1 later today to introduce a redesigned Blood Oxygen feature for Apple Watch Series 9, Series 10 and Ultra 2 users in the United States.
  • Masimo claimed patent infringement, prompting the U.S. International Trade Commission to impose an import ban in December 2023, which Apple says led to removing the feature on January 18, 2024.
  • Measuring and processing of sensor data moves from the watch to the iPhone under the new design, and results can be viewed in the Health app’s Respiratory section.
  • U.S. Customs has cleared imports of affected Series 9, Series 10, and Ultra 2 watches, enabling restored blood oxygen readings after the update. Apple says the move, driven by a recent Customs ruling, allows affected models in the U.S. to resume monitoring.
  • In recent years, Apple Inc. has expanded its health care efforts by releasing sleep apnea and hearing health features, with the upcoming Apple Watch Series 11 reflecting this focus.
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Apple has announced that it will implement a redesigned Blood Oxygen feature for certain users of Apple Watch Series 9, Series 10 and Apple Watch Ultra 2 models in the United States. This new feature will come through a software update for the iPhone and Apple Watch, which will be available today.To access this feature, users of supported models in the United States who currently do not have the Blood Oxygen feature will need to upgrade their de…

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MacRumors broke the news in United States on Thursday, August 14, 2025.
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