ReactJS
ReactJS (A.K.A. React.js or React) is a free and open-source front-end JavaScript library for building user interfaces based on UI components. It is maintained by Meta (formerly Facebook) and a community of individual developers and companies.
React Native
React Native is an open-source UI software framework created by Meta (formerly Facebook) is used to develop applications for Android, iOS, MacOS, Web and Windows by enabling developers to use the React framework along with native platform capabilities.
Conclusion
ReactJS is for web UI and React Native is for developing native apps on multiple platforms.
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