React Native New Architecture

React Navigation is the most widely used routing and navigation library for React Native applications. It provides stack, tab, and drawer navigators that mimic native navigation patterns on both iOS and Android, with smooth transitions and gesture support. Its JavaScript-based approach means navigation logic is fully customizable, and it integrates with deep linking, authentication flows, and state persistence out of the box.

Turbo Modules are the next-generation native module system in React Native's New Architecture, replacing the traditional bridge-based modules. They use the JavaScript Interface (JSI) for direct, synchronous communication between JavaScript and native code, eliminating the serialization overhead of the old JSON bridge. Turbo Modules also support lazy loading — they're only initialized when first accessed rather than at app startup, which significantly improves launch performance.

Deep linking is the ability to direct users to a specific screen or content within a mobile or web application via a URL, rather than just opening the app's home screen. In React Native and Flutter, this involves configuring URL schemes (e.g., `myapp://profile/123`) or universal/app links that work across platforms. Deep linking is essential for push notification routing, marketing campaigns, sharing content between users, and creating seamless web-to-app transitions.

Styled Components is a popular CSS-in-JS library for React and React Native that uses tagged template literals to style components. It automatically generates unique class names, supports dynamic styling based on props, handles vendor prefixing, and provides full theming capabilities. The library colocates styles with components, making it easy to understand what each component looks like and to delete styles safely when removing components.

Expo is a platform and set of tools built around React Native that simplifies mobile app development by providing a managed workflow, pre-configured native modules, and over-the-air update capabilities. With Expo, you can start building without installing Xcode or Android Studio, test on physical devices via the Expo Go app, and deploy updates without app store review cycles. Expo's EAS (Expo Application Services) handles cloud builds, submissions, and updates for production apps.

A WebView is an embeddable browser component that renders web content (HTML, CSS, JavaScript) inside a native mobile application. It allows developers to reuse existing web code within a native app shell, commonly used for displaying rich content, integrating web-based features, or building hybrid apps. While convenient, WebView-heavy apps typically have worse performance and a less native feel compared to truly native or React Native/Flutter approaches.