React Native App Development is the process of building mobile applications using Facebook’s open-source framework, React Native, which allows developers to write code once and deploy it across both iOS and Android platforms. It leverages JavaScript and React to create native-like user interfaces, offering faster development cycles and reduced costs compared to building separate apps for each platform. With features like hot reloading, reusable components, and access to native APIs, React Native enables developers to deliver high-performance apps that feel and function like fully native applications. This approach is widely adopted by startups and enterprises alike to create scalable, cross-platform mobile solutions efficiently.