День веселья в клане фанатов нестандартных языков. То swift используют на android, а то решили на rust писать для iOS www.bignerdranch.com/blog/building-an-ios-app-in-rust-part-1/

Building an iOS App in Rust, Part 1: Getting Started with Rust - Digital product development agency | Big Nerd Ranch

If you're developing an app on multiple platforms, you'll often face duplicate work. C++ is the reigning king of the hill for portable, native library development, but there's a new challenger in Rust.