I want to turn my idea into a fully-functioning mobile application that runs smoothly on both iOS and Android. The work covers everything from planning the architecture and designing the interface to coding, testing, and submitting the final binaries to the App Store and Google Play. I already know I need one shared code-base or two native projects—whichever you recommend to ensure performance, maintainability, and a modern user experience. Feel free to suggest whether Flutter, React Native, Kotlin + Swift, or another proven stack best fits the goal. Deliverables I expect: • Source code, well-documented and clean • Build-ready projects for iOS and Android • A brief hand-off guide so I can maintain or extend the app later If you can estimate a realistic timeline and outline your preferred workflow (version control, testing approach, CI/CD, etc.), that will help me choose the right partner quickly.