Joe Tuan, the founder of TopFlight Apps, breaks down the meanings, differences, and core concepts of user interface and user experience design.

Today, you can’t build a successful mobile app or website without effective user experience (UX) and user interface (UI) design. Job boards are filled with ads looking for UX/UI designers to help create appealing products and services layered on top of myriad gadgets and devices. But what are these really, and how do you know if you need a UX or UI designer to build your product? Read on to find out.