The Flutter hackathon, co-sponsored by FlutterFlow and Invertase, invites developers to build beautiful apps using the hybrid framework Flutter/Dart and Supabase within a 10-day timeframe. The competition has five categories with prizes for various aspects of the projects, including technical impressiveness, visual appeal, and creativity. Participants can submit their projects individually or in teams of up to five people, with a deadline of May 21st, 2023. A panel of judges, including representatives from FlutterFlow, Invertase, and Supabase, will evaluate submissions based on criteria such as functionality, design, technical skill, and use of features like Supabase. The event is open to developers who want to showcase their skills and creativity with Flutter and Supabase.