There are many cross-platform mobile technologies on the market. React Native and Flutter are, by far, the two most popular. React Native was created in 2015 by Facebook, and Flutter was created in recent years by Google. Cross-platform mobile technologies allow developers to write code once, and deploy to both iOS and Android. React Native is built with JavaScript, whereas Flutter uses a lesser known programming language called Dart. JavaScript is certainly one of the strenghts of React Native, given that it has a very large developer community and a lot of resources. For a complete overview of React Native vs. Flutter, see the unofficial React Native guide.
React Native is a cross-platform mobile technology that allows developers to create apps for iOS and Android from one codebase. There are many benefits of React Native, including reduced cost and increased efficiency over native development. Whereas traditional mobile development requires separate developers for iOS and Android, with React Native you can consolidate your efforts with a single development team that creates an application for both platforms. React Native was created by Facebook in 2015 and has since become the leader in the cross-platform mobile development space.