In this class, you will be building your first smartphone application using React! React is the most popular programming language for building smartphone applications. It is used by Facebook, Instagram, Airbnb, and many other companies. We will cover what React is, what a mobile app is, what a smartphone is, and the different parts of a smartphone. We will also cover the programming basics, such as logic and simple data structures. Finally, we will learn how to write our first smartphone app.