Apple users are quite happy and satisfied with IOS 9 and upgrading the software fairly rapid pace.
Apple make an rough estimate “According to the figures confirmed by Apple on their App Store Distribution page, which suggests that 66% of iOS devices are now running iOS 9 or iOS 9.1, as of 2 November. “
This is in ambiguous similar to Google’s Android OS which remains to fight with fragmentation and innovative varieties of the operating system range user devices after significant delay, if at all.
Associations and comparison with Google’s Android cannot be dodged. A year afterward the announcement of the Lollipop operating system (Android 5.0 and Android 5.1), just 23.5% of Android phones run that software.