Flutter

Flutter is an open-source user interface software development kit created by Google. It lets developers build applications for the web, Fuchsia, Android, iOS, Linux, macOS and Windows from a single codebase. It was first described in 2015 and released in May 2017, and Google uses it internally in apps such as Google Pay and Google Earth, as do outside developers including ByteDance and Alibaba. Unlike frameworks that lean on the host platform's own widgets, Flutter ships with its own rendering engine that draws pixels directly to the screen, so the same interface code runs on every target. Applications are written in the Dart language, and a hot reload feature shows code changes without restarting the application.