React Native

React Native is a JavaScript framework for building cost-effective native mobile apps and was originally developed by Facebook. It is often used for building cross-platform apps that can run on both Android and iOS devices.

It promises a "learn once and write anywhere" environment which is sometimes misinterpreted as "write once and run anywhere".

The main benefit of React Native over another framework like SwiftUI is it allows developers to build reusable cross-platform UI components. However, unlike React which runs in a web browser, React Native translates the components into native code that can run directly on a mobile device. This means apps built with React Native have a native look and feel, and can access the device's native features such as the camera, GPS, and push notifications.