Google, Inc. claims that Android 5.0 Lollipop, or Android L, is the most radical version of the operating system since its 2008 launch. Apple, Inc. too is proud to have released its most exciting iOS ever in iOS 8 and iOS 8.1. The two tech giants have battled over several market segments, but the OS layer is arguably one of the toughest to decide on.

The "sweet take on Android" has begun rolling out for a number of Nexus and Motorola devices last week. It boasts a number of improvements with the fluid "Material Design" at the core of the update. Android 5.0 Lollipop synchronizes Android smartphones and wearables.

The latest Android OS also presents users with options for less distractions and freedom to create their own rules. In fact, they can lend their handsets to family or friends without having to worry of privacy, since restrictions on access to certain applications can be applied.

Apple's iOS 8 design takes the opposite route and went for the "flat" look, which aids users to swipe swiftly.

If Android's primary goal is to refurbish the appeal and visual fidelity, the iPhone makers concentrated on performance. Apple clearly wants to let the apps talk to each other.

Just like Android 5.0 Lollipop, the iOS 8 launch was plagued with bugs and concerns from several users. Apple continues its debugging updates to its mobile OS via iOS 8.1 download.

"This release includes bug fixes, increased stability and performance improvements for iPad 2 and iPhone 4S," the update description said.