The document discusses different types of mobile applications that can be developed with Oracle tools, including native, web-based, and hybrid applications. It focuses on how to build hybrid mobile apps with Oracle ADF Mobile, which allows developing once and running on multiple platforms like iOS and Android, and provides out-of-the-box user experience components, layouts, and patterns that follow native design guidelines. Development is done visually in JDeveloper with Java for business logic and HTML5/JavaScript for the user interface.