Many types of mobile operating systems (OS) are available for smartphones, including: Android, BlackBerry OS, webOS, iOS, Symbian, Windows Mobile .
Among them most popular are the Apple iPhone, and the newest – Android.
Android is a mobile operating system developed by Google. Android is the first completely open source mobile OS, meaning that it is free to any cell phone mobile network.
Since 2008 OSs allow the user to download applications ("apps") like games, GPS, Utilities, and other tools.
Any user can also create their own Apps and publish them.
