App design is an ongoing process comprising user experience (UX) and user interface (UI) elements. Designers ideate, define solutions, create the app’s flow and structure, and make stylistic choices from colors to fonts. They base choices on user research and feedback. The end result is an app that looks nice and is easy to use.
A mobile app’s focus should be on the users, always. This is because user experience and engagement are major determining factors of the success or failure of a mobile application. Keep in mind that the value of an app does not depend on its features. Instead, it’s dependent on the UX quality.