Food Delivery Signup App Development

I'm launching a food delivery startup in Jaipur, India, and need a basic dummy app for Android (must) and iOS (preferred).

Core Features:
- User Signup: Mobile number and email
- Restaurant Signup: Name, location, cuisine type, operating hours; upload full menu (category, items, price, veg/non-veg, optional photo)
- Optional: Simple admin panel for data management

Preferred Tech: Flutter / React Native + Firebase (or your suggestions)

Ideal Skills and Experience:
- Experienced app developers
- Previous work on food delivery apps
- Ability to share links to past similar work

Please provide:
- Timeline estimate
- Cost breakdown