Apple today updated its iOS 15 installation numbers for the first time since iOS 15 was released in September, giving us an idea of how many devices are running the latest update four months after it launched.
iOS 15 is installed on 72 percent of all iPhones introduced in the last four years. 26 percent of devices continue to use iOS 14, and two percent run an earlier version of iOS. When counting iPhones released more than four years ago, 63 percent of them run iOS 15, 30 percent run iOS 14, and seven percent run an earlier version of iOS.
