App development is the process of creating software applications for mobile devices, such as smartphones and tablets. It involves the use of programming languages and tools to design, develop, and test mobile apps. App developers use a variety of platforms and frameworks, such as iOS, Android, and Flutter, to build apps that are functional, user-friendly, and visually appealing. The goal of app development is to create apps that meet the needs of users, providing them with valuable and convenient experiences on the go.