I've been working with Flutter for a little over 2 years nonstop. Before I started this project, knowing enough react, I experimented with react native, Expo, also quasar, capacitor, nativescript, and other cross-platform mobile solutions. Flutter/Dart was just nicer to deal with than everything else. I needed to work with C code too, and Flutter made it straightforward with FFI.

The developer experience was great and the Flutter team was very responsive with questions I asked.