Create a fully functional, well-structured codebase for a mobile application for both iOS and Android, with compiled builds ready to submit to the App Store and Google Play.

- Create a mobile application from scratch for both iOS and Android - Use an efficient toolchain such as Flutter, React Native, Swift + Kotlin, or another framework - Turn UI wireframes and brand assets into a polished, responsive interface - Wire up back-end endpoints - Ensure the finished product passes standard QA checks on real devices for each platform - Provide the complete source code, build instructions, and compiled builds