Flutter

These apps are written in Dart with Flutter and usually ship to Android from the same codebase. The biggest project is Immich, a self-hosted photo and video backup service whose mobile app is built in Flutter. GSYGithubApp is a full GitHub client, Hacki is a Hacker News reader on the App Store, and Habo and Table Habit are offline habit trackers that are also on the App Store.

Other entries worth a look are Medito, a free meditation app, orgro, an Org Mode viewer and editor, and Airdash for sending files between devices. There are also UI studies such as Flight Search, a Gmail clone and Flutter Wallet UI, which focus on layout and animation rather than a full product. If you are learning Flutter on iOS, check the ios folder in each repo to see how platform code, signing and plugins are set up. The GPL and AGPL licenses on apps like Hacki and Medito matter if you plan to reuse code in a closed app.