UI: This is an acronym for ‘User Interface’. It deals with how a website or an application looks. It covers the entire look of the application including the colors, fonts, icons and images used. The user interface is entirely about the visual and interface design.
UX: It deals with how easily a user can, well, use the app and how easily the app would serve to satisfy his requirements.
Consider this example: Say, you’re making a mobile app. When designing the interface (UI) of your app, you should not only consider how great your app will look, but also how easy it will be to use, i.e. how great the User Experience (UX) will be.
Consider this example: Say, you’re making a mobile app. When designing the interface (UI) of your app, you should not only consider how great your app will look, but also how easy it will be to use, i.e. how great the User Experience (UX) will be.