In a post on its developer portal, Apple says 39 percent of devices are still running iOS 11 and 11 percent are running an even older OS.
Further, Apple says iOS 12 adoption has reached 53 percent among devices released within the past four years. Additionally, forty percent of the devices released within the past four years are running iOS 11, while seven percent are running older versions of iOS.
iOS 12 brings a number of features to Apple devices, including the cartoon Memoji faces, Screentime digital wellbeing tool and the 32-person Group Facetime. A full list of iOS 12 features and improvements can be found on Apple’s website.