App development is the process of creating software applications for mobile devices, desktops, or web platforms. It involves a series of stages, including planning, design, coding, testing, and deployment. Developers use various programming languages (e.g., Java, Swift, Python) and tools to build the app’s functionality, ensuring it meets the intended purpose and provides a seamless user experience. The process may also include maintenance and updates after the initial launch to improve performance and add features.