Apple has revealed that nearly half of the devices that connect to the iOS App Store are now running its latest mobile OS. As of September 21, the adoption rate of iOS 8 stood at 46 percent, according to the numbers released by the company on its App Store Distribution page.

With this, the number of Apple devices running the outgoing iOS 7 has come down drastically, although it still rules the land with 49 percent share, while only 5 percent of users are on earlier versions.

Before the release of iOS 8, the proportion of users on iOS 7 was at around 92 percent, while 7 percent were using iOS 6 and only 1 percent were using earlier versions of Apple's mobile operating system.

The installation spike can also be partly attributed to the record-breaking sales of the iPhone 6 and the iPhone 6 Plus, which sold more than 10 million units over the weekend.

Last week, there were reports that Apple's latest mobile operating system was off to a slower start than iOS 7, with an adoption rate of around 17 percent in the first 24 hours of its rollout, which is around half of what iOS 7 saw on its first day.

That could have been partly because of the storage issues faced by users while upgrading to iOS 8, as installing it over-the air requires around 5.7GB of free space on your device, and the number varies depending on the device, shooting up to 7GB on certain iPad models.