Dart

Every Dart tutorial on this list uses Flutter, Google's UI toolkit for building iOS, Android, web and desktop apps from one Dart codebase. They are all long YouTube videos that clone a well-known app, which makes them good for learning how a real app is structured: screens, navigation, state, and a backend such as Firebase.

If you are new to Dart, start with a smaller clone like the Wordle Clone or the Multiplayer TicTacToe Game, then move on to bigger apps such as the Instagram, WhatsApp, TikTok or Amazon clones. Flutter and its packages change quickly, so expect some code in older videos to need updates for current versions and null safety.