Thanks to a collaboration between Google and Adobe, it's now possible to use the Adobe XD design tool to create UI for Flutter apps.

Flutter lets you build compiled, cross-platform mobile, desktop, and web applications from a single codebase. Get started with Flutter and its easy-to-use programming language, Dart.

With the latest development releases, you can now build Flutter apps for Win32, using the same controls and design tools to deliver desktop code at the same time as you build mobile apps.