Expo is a framework and a platform for universal React applications. It is a set of tools and services built around React Native and native platforms that help you develop, build, deploy, and quickly iterate on iOS, Android, and web apps from the same JavaScript/TypeScript codebase.
Electron is a framework for creating native desktop applications with web technologies like JavaScript, HTML, and CSS.
Run app on iOS simulator
$ npm run ios
Run app on Browser
$ npm run web
Generate static files for web
$ npm run web:build
Run desktop app
$ npm run desktop