React is a JavaScript library designed to utilize HTML to create webpages within a browser, facilitating the construction of a high-performance user interface (UI) layer. React Native, on the other hand, is a distinct entity—a framework that employs a unique syntax to create native components, catering specifically to mobile platforms such as Android and iOS. Both React and React Native structure applications around components, but their syntaxes differ. While React employs CSS styles for enhancing the application, React Native uses its own style sheets. Code sharing between React and React Native is not a straightforward process. The core components and application logic, which rely on JavaScript, can be the same in both cases. However, a complete UI implementation requires platform-specific knowledge. Thus, transitioning an application from React to React Native, or vice versa, demands specific expertise and development effort.