# and Ultra 2 Archives

Source: https://www.macworks360.com/tag/and-ultra-2/

# Tag: and Ultra 2

## [Blood Oxygen Monitoring Returns to Recent US Apple Watches with Software Updates](https://www.macworks360.com/blood-oxygen-monitoring-returns-to-recent-us-apple-watches-with-software-updates/)

[![A smartwatch on a person’s wrist displays a blood oxygen level of 100%, the time as 3:38, and a message stating, "You can view Blood Oxygen measurements." Blood Oxygen Monitoring returns to recent US Apple Watches with software updates.](https://www.macworks360.com/wp-content/uploads/2025/09/blood-oxygen-monitoring-returns-to-recent-us-apple-watches-with-software-updates-1024x640.jpg)](https://www.macworks360.com/blood-oxygen-monitoring-returns-to-recent-us-apple-watches-with-software-updates/)

With the release of iOS 18.6.1 and watchOS 11.6.1, Apple restored blood oxygen monitoring capabilities to US Apple Watch Series 9, Series 10, and Ultra 2 models that previously had […]