Apple's latest version of its mobile operating system, iOS 12 was released in September 17th and is now reportedly on 50 per cent of all devices including iPhones and iPads. Apple says 53 [er cent of devices in the past 4 years are using iOS 12.
Operating system rollouts have been a strong feature for Apple devices with the majority of users donwloading, installing and enjoying the new features within days of availability. Apple is also good for letting older devices work with new versions of the OS, oftentimes even improving performance and battery life on older modles. This has been the case with iOS 12 which has extended performance and usability on older iPhones and iPads.
The OS adoption rate and backwards compatibility has been a strong point for Apple. Android devices usually stop supporting newer versions after two upgrade cycles.