Ionic is a widely used open-source framework designed for creating cross-platform mobile applications. It leverages HTML, CSS, and JavaScript and allows developers to build high-performance apps for iOS, Android, and the web using a single codebase. Ionic's extensive library of UI components and smooth integration with Angular, React, and Vue streamline the mobile app development process. Ionic Training in Chennai, offered by FITA Academy, equips aspiring developers with the knowledge and skills to master Ionic development and build compelling mobile applications.