iPhone Operating System (iOS) has seen a development both in hardware and software beyond remarkable over the last few years.
Back in 2007, the first Apple smartphone, the Apple iPhone, arrived with iPhone OS, which was (naturally) the most basic representative of the platform. As such, it was devoid of many features that iOS users now take for granted. For example, there was no App Store, as it did not exist at the time.
Since then, a lot has changed with each subsequent release. iOS1-iOS8 evolution has been so fast that iPhone OS is already amongst the older mobile operating systems in active development today.
Here is a stroll down iOS history by 7 Day Shop of the home screen, app icons and the most noteworthy features of each major version of iOS.
TIPS FOR: apple operating systems, ios apps, what is the latest ios version, learn ios