Mobile app development is the process of creating applications for mobile devices like smartphones and tablets.

 It includes building native apps (for iOS or Android), hybrid apps (using web technologies), or progressive web apps (PWAs). Development involves planning, design, coding, testing, deployment, and maintenance.

Key technologies include Swift, Kotlin, React Native, and Flutter. Developers focus on user experience, performance, security, and scalability. Apps can be monetized through in-app purchases, ads, subscriptions, or a freemium model.