It"s been almost four months since Apple released iOS 10, the latest major update to its mobile operating system. The OS was made available to a wide range of the company"s older devices, as well as coming pre-installed on its newest iPhone 7 and iPhone 7 Plus handsets.
That"s left iOS 9 installed on just 18% of active devices; a day before iOS 10 was released, version 9 peaked at 88%. 6% of iOS devices still in use remain on older versions of the operating system.
Apple has since rolled out numerous smaller updates to iOS 10; a beta of iOS 10.3 - rumored to include a new "Theatre Mode" - is expected to be released next week.
Source: Apple Developer via MacRumors