Customizable Art Experience Mobile App

I need a full-featured iOS and Android application that delivers immersive, city-specific art experiences and includes an integrated marketplace.

Core experience
• Offer three curated paths: Gallery tours, Street art tours, and an Augmented Reality layer that lets users point their camera at landmarks or murals to reveal extra content.
• Allow me to preload one city—Madrid—while keeping the architecture flexible so I can easily roll out additional cities later. Each city should have its own set of tours, maps, AR assets, and localized content.

Marketplace
Please embed a seamless storefront where users can:
1. Browse artist profiles with bios, portfolios, and social links.
2. Purchase artwork through a secure payment gateway (Stripe, PayPal, or your recommended PCI-compliant option).
3. Leave user reviews and star ratings after a verified purchase.

Administrative needs
• Simple CMS or admin panel for adding new tours, updating artwork listings, and approving reviews.
• City-level configuration for language, currency, and map data.
• Analytics hooks (Firebase or similar) to track installs, session length, and conversion through the marketplace.

Technical expectations
• Native or cross-platform codebase (React Native, Flutter, or Swift/Kotlin split—open to your recommendation) that meets current App Store and Google Play guidelines.
• Clean, well-documented code with modular architecture so additional cities and AR assets can be shipped as lightweight updates.
• REST or GraphQL backend with authentication, cloud storage for media, and GDPR-compliant user data handling.

Deliverables
• Source code for both platforms.
• Documentation covering setup, deployment, and how to add a new city.
• One live build per store (TestFlight and Google Play Internal Testing) ready for my review.

If you have prior experience combining AR features with e-commerce or cultural tour apps, let me know. I’m looking to start development promptly and aim for an initial Madrid launch this year.