React Native app development is particularly beneficial for startups due to its key features. The framework allows for rapid development and deployment, enabling startups to bring their products to market quickly. The use of a single codebase for both iOS and Android significantly reduces development costs, which is crucial for startups operating on tight budgets. Additionally, React Native offers easy integration with third-party plugins and native modules, enhancing app functionality without extensive custom development. Its hot-reloading feature accelerates the testing and iteration process, allowing startups to refine their React Native applications efficiently and effectively.