Cross-Platform Mobile App Development

I need a full-featured mobile application built from the ground up and released on both the Apple App Store and Google Play. The core concept is already outlined; what’s missing is solid engineering that turns it into a polished product.

Here’s what I’m after:
• A single, maintainable code-base (React Native, Flutter, or another cross-platform approach you recommend) compiled to native iOS and Android apps.
• Clean, modular architecture so future features can be added without rewrites.
• All screens designed to current iOS and Material Design guidelines, tested on phones and tablets.
• Seamless hand-off: complete source code, build instructions, and store-ready release builds.

Once the first milestone is working on real devices, we’ll refine UI/UX, add any needed integrations, and move toward store submission. I handle product direction and assets; you handle development, debugging, and deployment.

If you’ve shipped apps to both stores and can point me to examples, let’s talk about timelines and your preferred framework.