The StreetComplete app, which allows users to edit OpenStreetMap data, is now available in public beta on iOS. The app uses Kotlin Multiplatform to share code between Android and iOS, minimizing platform-dependent code. The development process involved separating platform-specific code from application logic and migrating the UI code to Compose Multiplatform. The app aims to make contributing to OpenStreetMap easy for users without prior knowledge of OSM tagging schemes.