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A development team rewrote their Android app from Kotlin/C++ to pure Rust using NDK and NativeActivity. They highlight Rust's advantages including compile-time correctness enforcement, better maintainability with a single language codebase, open-source ecosystem transparency, and lighter tooling. The rewrite resulted in a 4MB APK and eliminated runtime crashes common in their C++ implementation, though they acknowledge this approach doesn't work for all Android apps due to limitations like onscreen keyboard support.

We built an Android app with Rust, and we're glad that we decided to.

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