BlackBerry smartphones allow users to access communications, information, and applications through their mobile operating system and app store, BlackBerry App World. Research in Motion developed the BlackBerry and its proprietary BlackBerry OS. While BlackBerry once dominated the US smartphone market, its global market share has declined in recent years as Android and iOS have grown. BlackBerry App World provides access to over 10,000 apps, though its catalog remains smaller than those of Android and iOS.