A good tech product is made of good UI and UX, if you watched some keynote of product launch (for example, Apple product launch keynote). The keywords – UI and UX usually will get mentioned a few times. So, what’s UI and UX? A picture is worth a thousand words, Ed Lea created this photographic infographic to visually define the differences between user experience and user interface design and how they relate to a product.
Wikipedia definition
User experience is the way a person feels about using a product, system or service. User experience highlights the experiential, affective, meaningful and valuable aspects of human-computer interaction and product ownership, but it also includes a person’s perceptions of the practical aspects such as utility, ease of use and efficiency of the system. User experience is subjective in nature, because it is about an individual’s feelings and thoughts about the system. – Wikipedia
User interface design or user interface engineering is the design of computers, appliances, machines, mobile communication devices, software applications, and websites with the focus on the user’s experience and interaction. The goal of user interface design is to make the user’s interaction as simple and efficient as possible. – Wikipedia