And yet it’s common to see websites and apps launch with glaring UI mistakes that drastically degrade the user experience. In this article, we will discuss five of the most common (and therefore most frustrating) UI mistakes found in websites and native mobile applications. But first, let’s look at the differences and similarities between user interface (UI) and user experience (UX).
UI vs. UX: What’s the Difference?

It’s easy to confuse user interface and user experience. After all, the former dictates much of the latter. But it’s important to know the difference:

User Interface Definition: UI is the means by which a human interacts with a computer system. It’s a way to guide a user through visual representations through the interface. So background colors, fonts, buttons and icons all fall under the user interface.