The feature was removed on select smartwatches due to a patent-infringement lawsuit, but Apple has “redesigned” it.

Apple is bringing blood oxygen monitoring back to some Apple Watches with an update after a US Customs ruling.

Apple is bringing back its blood oxygen monitoring feature on some Apple Watch models in the U.S. This is the same feature that first came out with the Series 6 back in 2020. It had been removed from the Series 9,