Tutorial by The Net Ninja.
From the YouTube playlist description:
"In this Flutter tutorial for Beginners series, I'll show you how to use Flutter (and Dart) to create Android and iOS apps from scratch. We'll learn all about widgets, packages, assets & asynchronous code to create a World Time app, as well as 2 other mini apps to put your Flutter skills to good use!"
Web build of the last tutorial project (world_time) deployed on GitHub Pages