Most of the modern languages and frameworks used to present a to-do list as their sample app. It is a great way to understand the basics of a framework as user interaction, basic navigation, or how to structure code. We'll start in a more pragmatic way: building a shopping list app.
You will be able to develop this app in React Native code, build it for both iOS and Android, and finally install it on your phone. This way, you could not only show your friends what you built, but also understand missing features that you can build by yourself, thinking about user-interface improvements, and above all, motivating yourself to keep learning React Native as you feel its true potential.
By the end of this chapter, you will have built a fully-functional shopping list that you can use on your phone and will have all the tools you need to create and maintain simple stateful apps.