The most popular smartphone operating systems are Android, iOS, BlackBerry and Windows. Operating systems such as iOS are specific to Apple smartphones, while the Android operating system can be found with many different smartphone manufacturers such as HTC and Samsung. Every phone comes with an operating system, but these are very non-descript with normal mobiles and rarely affect the purchasing decision. In contrast, operating systems are a crucially important factor to consider with smartphones because they have a big impact on the smartphone's overall usability, functionality, convenience and number of available features. For example, the new HTC BlinkFeed is a dynamic home screen which combines news feeds and social networking accounts in one central location, and the iOS App Store provides access to countless high quality mobile applications.