I recently stumbled upon this (and it sounded great!), but was already too far in the development cycle of a medium sized Swift UI iOS app. Instead I used ChatGPT & Claude to convert the SwiftUI Code to Kotlin & Jetpack Compose & Material3. This worked crazy well. The generated code worked almost instantly and basically just needed small modifications for the styling /theming. I think the similarities in SwiftUI and Jetpack Compose make this a great match for LLMs
the code I got is pretty maintainable and it’s all standard kotlin & jetpack compose. Even the ui tests converted nicely. The big effort was the initial conversion of the app to Android, for maintenance I won’t necessarily use LLMs