As such it is one of the simplest possible models of computation. Nevertheless, there is an elementary cellular automaton (rule 110, defined below) which is capable of universal computation.
In 2012, there were some 3,997 distinct Android devices. This year there are a whopping 11,868. Eight versions of Android are currently in use and 37.9 percent of users are running Jelly Bean, the latest version of the mobile OS. Samsung's apparent share of the market is 47.5 percent.
Where you get your apps from depends on what kind of smartphone you're using. The three of today's biggest smartphone platforms-Android, iOS and Windows Phone-all come with browsable desktop web sites and accompanying app stores that arrive built-in as part of the phone's operating system.