The iOS7 brought about the biggest design changes on the Apple operating system since its inception. Designed by Jony Ive, the UI was characterized by a flat, 2D overhaul with bold colors, along with a new icons and a parallaxing effect.

Some of the newest features introduced on the iOS 7 were the iTunes Radio and AirDrop. At the Geneva Motor show 2014, Apple unveiled CarPlay as part of the iOS 7.1 update.

iOS8 is expected to launch in a similar fashion as the iOS7 with Apple announcing the iOS 7 last June and launching the OS on the iPhone 5S late last year. The same trend is likely to follow this year with the launch of iPhone 6.

Apple's intention with iOS 7, is unlikely to change much with respect to the UI. You can also be sure that Apple is not interested in copying widgets that gave rise to Android's popularity.

One strong developing trend in combination with the nex iOS would be the integration of health and fitness features. The iWatch, will particularly play a big part in the developing a Healthbook, that will run on iOS 8.

"The new health and fitness application's interface is a stack of cards that can be easily swiped between. Each card represents a different fitness or health data point. The prototype logo for "Healthbook" is similar to Passbook's icon, but it is adorned with graphics representing vital signs," MacRumors reported.

Apple's digital assistant Siri will play a more serious role than just being a gimmick as it will open up to more third-party developers.

Apple Maps will make a bigger effort to match up to consumer expectations, though it has flopped since its release.

Mobile payment functionality is another function that the iOS8 will undertake, according to a report by the Wall Street Journal.