The lecture shows how to generate a React Native project using create-expo-app.

Then it shows you how to power up the development server.

You will need a smartphone with the Expo app installed so that the application can be loaded on it.

If you are using macOS and have trouble with an error related to listening to too many files, you can try installing watchman using Brew like so:

brew install watchman

The lecture shows you the code for the mobile application. It demonstrates how you can make a code change and have it automatically reflected in the smartphone via hot reload.

The lecture also shows you how to open a development menu where you can do things like reloading the application. One of the ways to bring up that menu is by shaking your phone.