You write your UI in platform-native options like SwiftUI or Jetpack Compose. You could also write it in React Native or Flutter. But honestly I don't think they are worth it. When the UI is a pure function you can vibe-code it. Your application is written and tested in Rust.

The UI above was a Cursor one-shot based on this TLDraw diagram. Notice how it put the "choose mint" screen in the wrong place. History screen was also broken so commented it out.

Forget React Native and Flutter!