Of course, this 80 percent includes only devices that are compatible with the latest version of Apple's mobile operating system. This list includes the iPhone 5S, iPhone 5C, iPhone 5, iPhone 4S, and iPhone 4, as well as the third and fourth generation iPads, iPad 2, iPad Mini and iPad Air.

Apple added that iOS 6 is now on just 17 percent of iDevices, while older versions of the mobile operating system are on just three percent of iPhones and iPads.

Apple is probably feeling smug about this, as Google's latest Android version - Android 4.4 Kitkat - is so far on just 1.4 percent of devices, despite having been released two months ago. While the popularity of iOS 6 is starting to wain, Google's previous Android 4.3 Jelly Bean remains the most prominent version, accounting for approximately 59 percent of devices.

This wasn't all Apple announced during its earnings call on Monday. CEO Tim Cook also revealed that Apple will enter new product categories this year, hinting at a wearable iWatch device. He also hinted that Apple might to enter the mobile payments market, saying that this was part of the thinking behind its Touch ID fingerprint sensor. µ