According to the latest Apple App Store data, Apple's latest operating system for mobile devices iOS 9 is now installed on over 60% of devices.
Apple's senior vice president of worldwide marketing Phil Schiller’s recently said that iOS 9 will be “downloaded by more users than any other software release in Apple’s history.” And judging by how fast users are upgrading to iOS 9, he could indeed be right. iOS 9 can be installed on any iPhone, iPad or iPod touch that runs iOS 8.
It took iOS 8 until late November to reach the 60% mark as reported by the App Store, which means users are upgrading to iOS 9 roughly twice as fast. The number of people on iOS 9 will continue to rise naturally as all new devices sales ship with iOS 9 pre-installed.
iOS 9 includes many system tweaks to make it easier to update, such as lower free space requirements, the ability to automatically update overnight whilst the user is sleeping and the option to temporarily delete apps while the update takes place.