Cross-platform mobile app development enables developers to create applications for multiple platforms like iOS and Android using a single technology stack, eliminating the need to write different versions for each platform. The article compares the developer experience (DX) of five popular frameworks—React Native, Flutter, Xamarin, Ionic, and NativeScript—based on setup, documentation, hot reloading, and debugging tools. React Native is praised for its easy setup with Expo and fast refresh feature, while Flutter stands out for its excellent documentation and powerful hot reload options. Xamarin is noted for its seamless integration with Visual Studio, Ionic for its simplicity and flexibility, and NativeScript for its comprehensive HMR feature. The article highlights the importance of DX in choosing a framework, as it impacts developer retention and satisfaction. Each framework offers unique strengths and challenges, suggesting that the best choice depends on specific project requirements and team preferences.