What is mobile app design? To put it in very broad terms, app designers are in charge of making an app look good, while developers make it work correctly. Mobile appdesign encompasses both the user interface (UI) and user experience (UX). iOS is a platform where design goes back to its roots. It reads like a modern magazine, with beautiful typography and simple layouts.
UI design focuses on the user’s visual experience. … The job of a UI designer is to design all the screens through which a user will move, and to create the visual elements—and their interactive properties—that facilitate this movement.