Businesses increasingly rely on cross-platform solutions for mobile app development to ensure smooth functionality across various devices, making the choice of framework crucial for performance and user experience. Two popular frameworks in this realm are Flutter and React Native, each offering unique advantages. Flutter, developed by Google, employs a widget-based architecture using the Dart programming language, allowing developers to create visually appealing apps with a single codebase. Its strengths include a widget-based UI, hot reload feature, and native performance, but it also has limitations like larger app size and a learning curve for Dart. React Native, created by Meta Platforms, uses JavaScript and a component-based model, enabling platform-specific versions of components and fast development with live reloading. Its strengths include reusable components and a vast ecosystem, though it may face platform dependencies and third-party reliance. Both frameworks offer high code reusability and integration with native code, but the choice between them depends on specific project needs, development speed, and available resources. Popular apps using these frameworks illustrate their capabilities, with Google Pay leveraging Flutter for global reach and Walmart using React Native to streamline its online shopping experience. Developers must weigh factors like user experience, development speed, and community support to decide which framework aligns best with their app development goals.