One of Google's key objectives with Android 4.4 was to make an OS that would run on devices with 512MB of RAM. On a phone like the Nexus 5, which is blessed with almost four times that amount of memory, the performance is predictably butter-smooth.

Android can finally boast the same responsiveness as Apple's iOS, with navigation and movement between applications being fast and largely lag-free. Of course, there are moments when things do become a little jerky, hardly a shock when you consider how much Android is doing behind the scenes, but these are less common than they were in Ice Cream Sandwich and Jelly Bean.