The terms User Experience (UX) and User Interface (UI) often coexist. Without a well-designed UX, it is difficult to find an effective UI - and vice versa. UX and UI design processes should be interrelated to bring the expected results. However, this does not mean that the two terms mean the same thing. UI stands for User Interface. It is the part visible to the user, i.e., the appearance and style of the application, the choice of colors, typography, buttons, forms, photos, and graphics - all that the user can interact with. And all designed in such a way as to create a coherent and eye-catching whole. UX stands for User Experience. It focuses on how the user interact with a given websites or mobile apps. It is the fundament on which the UI is built. User experience requires to meet the user's needs without unnecessary obstacles and problems and the simplicity and intuitiveness of products, the use of which is a pleasure. Well implemented UI and UX design services allow our clients to convert their marketing and advertising efforts, into real users, and customers.