An updated App Store statistics for April showed that 87 percent of iOS users are now using the iOS 7. Android Kitkat, conversely, is progressing slowly, which can be blamed on several flaws related to it including security problems for users.

According to the statistics, of all iPhone users, 87 percent has already migrated to the latest OS Version which was first released in September 2013. About 11 percent were still running on iOS 6, and the rest were running on earlier versions of iOS.

Aside from its increased usability, a survey taken by Iconfactory's Craig Hockenberry showed that 95 percent of developers were working to make their apps compatible iOS 7-compatible while about 52 percent has planned to release apps for iOS 7 alone.

Meanwhile, Google has reported slow migration progress with its Android Kitkat. It is currently being used by just 5.3 percent of all Android users.

The slow progress can most likely be attributed to difficulties in creating or even maintaining apps, or "unanticipated technical hurdles," said Emu chat app co-founder Dave Feldman to Apple Insider.

"Google's tools and documentation are less advanced, and less stable, than Apple's," he added. "Android's larger install base doesn't translate into a larger addressable market."

Steve Cheney, Head of Business Development at Microsoft's GroupMe, also implied the same thing, saying in his blog post, building and releasing on Android costs 2-3x more than iOS. This is due to a multitude of reasons: less sophisticated tools, generally more cumbersome APIs, fewer exposed advanced features, enormous QA issues brought on by fragmentation, etc. The rough rule of thumb is for every iOS engineer you actually need two Android engineers -- or twice the development."

Aside from the technical hurdles, Android's fragmentation and delay in updates has created security problems for users. Several reports, including Cisco's report, have shown that 99 percent of all malware attacks were aiming for Android.