How to add custom fonts in React Native

Fonts play a crucial role in user experience, and integrating custom fonts can give a unique identity to React Native applications, helping them stand out in a competitive market. This guide provides a detailed walkthrough on how to add custom fonts in React Native apps, including the use of Google Fonts. It covers methods for both React Native CLI and Expo projects, emphasizing modern practices such as using the `useFonts` Hook for Expo and the `react-native.config.js` file with `npx react-native-asset` for CLI projects. For optimal performance, the guide suggests leveraging system fonts when unique branding is not essential, handling font loading states to prevent the flash of invisible text (FOIT), and being mindful of font file sizes and variations. It also addresses common pitfalls like mismatched font family names, incorrect font paths, and unsupported font formats. By adhering to these best practices, developers can enhance user experience through effective typography in their React Native applications.