With my team's 14+ years of mobile app development experience, we have enjoyed working with FlutterFlow extensively. Aside from mastering the basics, we've developed a deep understanding on how to optimize your project on this platform. And, to answer your questions explicitly, yes we have an app in the iOS store completely built using FlutterFlow. We've also worked with FF projects that utilize GitHub and efficiently merged custom codes to your exacting specifications.
Regarding availability, dedicating a minimum of 10-15 hours per week for your project wouldn't be an issue on our end. As a team player, I am more than happy to align my schedule with your work timings from 8am to 6pm EST - maintaining clear communication and providing you updates every step of the way.
Lastly, besides our mastery over mobile apps using FlutterFlow, our cross-platform expertise extends to creating impressive web applications as well. By choosing us, you gain an experienced, reliable and client-centric partner who never compromises on innovation or quality. So let's harness the power of FlutterFlow together and turn your app idea into reality!