As a result of a legal dispute that started in late 2023, the Apple Watch Series 10 is shipping without the ability to measure blood oxygen levels with a pulse oximeter. After removing the blood oxygen feature from the Series 9 and Ultra 2 in January 2024, Apple has yet to reach a desired outcome in its patent dispute with Masimo.

Apple has not discussed whether the feature’s removal was a hardware change on the Series 10 or if it was simply disabled via the software, like with the Series 9.

The embiggening of the Apple Watch is nothing new. The original Apple Watch measured 38mm and 42mm. The Series 4 bumped that up to 40mm and 44mm. The Series 7 made it 41mm and 45mm. Today, the Series 10 measures 42mm and 46mm. Normally, I rail against the trend toward larger watches, but the Series 10’s display is worth every millimeter.

In the release announcing its Watch Series 10’s availability, Apple refers to the device’s “refined” design. It’s an accurate word for the device overall.

Apple's iPhone 16 Pro Max and Apple Watch Series 10 are larger devices — but they seem to come in smaller packages every year.

Although many people expected a grand redesign for the tenth-generation Apple Watch, Apple opted for smaller changes. The Apple Watch Series 10 is the same rounded-rectangular shape you get with the Apple Watch SE (and every other Apple Watch for that matter).

Here's how to get your hands on the Apple Watch 10 Is it time to upgrade your Apple Watch? If you've been eyeing the Apple Watch Series 10, your wait is over. The newest iteration of Apple's smart watch is available to purchase today.