Three main stages of the user interface design: User Research:The goal is to define who the customers of your product are and how they are going to use it Design and Prototyping:A good way is to start from the simple sketches and low-fidelity wireframes and to continue with high-fidelity wireframes, mockups, and prototypes. Evaluation :As we can see, the evaluation should be included in all stages of the design process. The main purpose of the evaluation stage is to assess the quality of a design, not in the abstract, but how it fits the users, meets their needs and displays all the product’s features. Also, we should identify promising areas for improvement and make some of them.