Apps available in the Ubuntu App Directory include Calculator Orange, Hearts Card Game, aPhoto, GIMP Image Editor and Airfoil Speakers for Linux. Ubuntu is an open source operating system that can be used on PCs, tablets and phones.
Apps available for the Ubuntu desktop version include Chrome, Skype, Twitter and VLC Player. Unlike other operating systems, Ubuntu does not come with any programs pre-installed; therefore, it's highly customizable and saves disk space.
Ubuntu does not use apps on its mobile devices. Instead, it uses "scopes." Scopes bring everything to a single page, eliminating the need to open and toggle between multiple apps.