Ubuntu Mobile is the name for a version of the Ubuntu operating system that is designed to run on smartphones, tablets, and other mobile devices. Ubuntu Mobile is made up of the same pieces that make up the desktop version of Ubuntu, but it's been adapted to work on devices with small screens and limited resources. So instead of large desktop apps, you get small apps specifically designed to work well on mobile devices. Ubuntu Mobile also includes features such as an on-screen keyboard, and the ability to sync settings and data across multiple devices.