Rudrank Riyam revealed on X that the Health app on his iPhone displayed a Sleep Score generated from data collected by his Garmin device. This points to two key takeaways:
watchOS 26 is not required to be installed on the Apple Watch for Sleep Score to analyse data from third-party devices.
Once iOS 26 is installed, users can view their Sleep Scores in the Health app, dating back to the very first night their third-party device tracked sleep.
Given Apple’s history of keeping new features exclusive to its own products, extending Sleep Score’s support to third-party devices is a surprising - but welcome - move. Also impressive is the retroactive reading of past data that was collected, but reshaped to fit the new sleep quality monitoring perk.
