The latest update brings with it a number of new features including QuickType, the Health app and iCloud Drive.
As of yesterday there are already 46 per cent with iOS 8 onboard with 49 per cent of products running the older iOS 7 and 5 per cent with earlier operating systems.
Before the release of iOS 8 last week 92 per cent of Apple devices were running iOS 7.
But users have responded to the latest iOS 8 update to bring it almost level with the number of devices running iOS 7.
The latest iPhone 6 and iPhone 6 Plus come preloaded with iOS 8.