Apple’s new iPhone software set an impressive record by Jonathan Chew @FortuneMagazine September 21, 2015, 10:57 AM EDT E-mail Tweet Facebook Linkedin Share icons Apple’s latest mobile operating system, iOS 9, has been downloaded at a faster rate than any other previous Apple OS, according to a company statement. With this momentum, as spelled out by Apple’ senior vice president of worldwide marketing Phil Schiller, iOs 9 is “on pace to be downloaded by more users than any other software release in Apple’s history.” More than 50 percent of devices have already migrated to the new OS, which was only released to the public on September 16. This would beat outsider estimates, which according to Apple Insider, was pegged at an early adoption rate of around 36%. This also beats early estimates comparing the adoption of iOS 9 with its predecessor, iOS 8. MacRumors said early analysis had shown that users had installed both operating systems at roughly the same pace, and it remains to be seen if any technical glitches could slow down the downloading of iOS 9, as was the case with the previous OS. The ease of upgrading operating systems also highlights a key differentiation between Apple and Google’s mobile operating system Android. The fracturing of many mobile phones running different variations of the Android OS means upgrading new versions take much longer on Google’s platform. The early 12% adoption rate for iOS 9 among Apple users in 24 hours, for example, took Android’s last operating system, Lollipop, 5 months to achieve.