Over the years, Flutter has attracted millions of developers who built user interfaces across every platform. Flutter began as a UI toolkit for mobile - iOS and Android, only. Then Flutter added support for web. Finally, Flutter expanded to Mac, Windows, and Linux. Across this massive expansion of scope and responsibility, the Flutter team has only marginally increased its size. To help expand Flutter’s available labor, and accelerate development, we’re creating a fork of Flutter, called Flock.