Codemagic is a fully hosted and managed CI/CD for mobile apps. You can build, test, and deploy with a GUI-based CI/CD tool. The free tier offers 500 free minutes/month and a Mac Mini instance with 2.3 GHz and 8 GB of RAM.
Shelf 533 free tiers
Flutter Related and Building IOS Apps without Mac
Services in Flutter Related and Building IOS Apps without Mac that offer an ongoing free tier for developers. Limits change often — confirm on the provider's pricing page before you build on one.
Spot something outdated? Fix it upstream ↗3/3
FlutLab is a modern Flutter online IDE and the best place to create, debug, and build cross-platform projects. Build iOS (Without a Mac) and Android apps with Flutter.
FlutterFlow
flutterflow.io
FlutterFlow is a browser-based drag-and-drop interface to build mobile app using flutter.