Custom Mobile App Build

My project centers on mobile app development and I need an experienced partner who can take the idea from initial concept through to a polished, store-ready release. I am still finalising the feature set, so I am open to expert guidance on whether we proceed with iOS, Android, or launch on both platforms simultaneously. What matters most is a smooth, engaging user experience backed by clean, maintainable code. If you are confident with native tool-chains (Swift, Kotlin) or modern cross-platform frameworks such as Flutter or React Native, please outline the advantages you see for this project and how you would approach performance, scalability and ongoing updates. Deliverables I expect: • Wireframes or clickable prototype to lock in the UX • Complete source code, well-documented and version-controlled • Tested builds ready for App Store and/or Google Play submission • A brief hand-over guide so future maintenance is straightforward Let me know your estimated timeline, recommended tech stack and any similar apps you have shipped. I look forward to shaping this app together.