ionic-team/capacitor

Capacitor is a tool made by the Ionic team that lets you build mobile apps for iOS and Android using the same web technologies (HTML, CSS, JavaScript) you would use to build a website. You write your app once as a web app, and Capacitor wraps it in a native container that runs on iOS and Android, giving it access to device features like the camera, GPS, notifications, and file system. The key idea is that you get a single codebase that can be published to the Apple App Store, Google Play Store, and the mobile web as a Progressive Web App (a website that can be installed on a phone's home screen and work offline). Capacitor provides a set of cross-platform APIs, functions you call in JavaScript that work the same way on all platforms, while internally translating those calls to the native code each platform requires. You can also write custom native plugins (small pieces of platform-specific code that bridge to device capabilities Capacitor doesn't cover out of the box), with iOS plugins written in Swift and Android plugins in Kotlin or Java. Many existing Cordova plugins (from an older similar tool) are also compatible. You would use Capacitor if you are a web developer who wants to ship a mobile app without learning native iOS or Android development, or if you already have a web app that you want to package as a native app. It installs via npm and integrates into any modern web project. It works well on its own, though it also pairs with the Ionic Framework for pre-built mobile UI components.