Apple Watch users are losing a popular health app after court's ruling in patent case

Apple says the ability to measure blood oxygen levels will no longer be available on the Apple Watch Series 9 and Watch Ultra 2 models, after the tech giant's loss in a patent case. (Chris Delmas/AFP via Getty Images)

Starting Thursday, the ability to measure blood oxygen levels will no longer be available on newly purchased Apple Watch Series 9 and Watch Ultra 2 models.

According to the tech giant, customers who purchase the watches in the U.S. will still be able to see Apple's Blood Oxygen app on their devices, but when tapped, users will get a message saying the feature is no longer available.