Aprenda Java is an Android app developed by Dário de Araújo Frazão that offers a comprehensive Java programming tutorial and quiz. The app covers a wide range of topics, including Java basics, objects, data types, variables, operators, strings, arrays, methods, constructors, control flow, overloading, static methods, packages, access modifiers, inheritance, polymorphism, abstract classes, interfaces, and exceptions.

The tutorial is organized in categories and comes with code examples to help users understand the concepts better. After completing the tutorial, users can test their knowledge by playing a quiz game that comes in three difficulty levels: beginner, intermediate, and advanced. The app is free to use and offers a great learning experience for anyone interested in learning Java programming.