A single code-base mobile application is required that installs and performs seamlessly on both Apple iOS and Android. I am happy with either Dart (Flutter) or Java-based tooling, provided the end result is a truly cross-platform solution. What matters most is clean, maintainable code and an end-to-end hand-off that lets me publish to the App Store and Google Play without extra refactoring. Please develop with current OS guidelines in mind so the binaries run on iOS 15+ and Android 11+. Deliverables • Complete, well-commented source code in a private Git repository • One test build per platform followed by store-ready release builds • Concise document covering project structure, dependencies, and exact build steps Acceptance criteria: the same feature set and interface must behave identically on both operating systems, compile without warnings, and pass each store’s automated checks. Milestones, feature specifics, and design assets can be defined together once development starts, and I’ll provide prompt feedback throughout the process.