Adding Custom Fonts to A React Native Application

While there's a good list of Native Fonts in iOS, that you can check with this react-native-font-list Demo App from Claudio Castro, you might need to go further and include your Custom Fonts to your React Native App.

Enters Nader Dabit with a great Tutorial that will teach you just this.
Please just don't do Comic Sans!

Adding Custom Fonts to A React Native Application blog post

Custom Fonts