Location-Based Shop Listing App

I need a cross-platform mobile application for iOS and Android that connects local shops with nearby customers. The build has two distinct experiences:

• User side
When someone signs in, the app immediately requests geolocation permission and then ranks shops and items by proximity. Core features include individual product pages, a shopping cart, wishlist, secure payment gateway integration, and the ability for customers to leave reviews and ratings.

• Seller side
A new merchant signs up by entering full store details, then lands on a dashboard where inventory can be added or edited, stock levels tracked, and incoming orders confirmed or rejected in real time.

Clean, modern UI/UX, smooth performance, and reliable location accuracy are critical. Please base your proposal on native or a proven hybrid stack that can meet these needs, and describe how you will handle data security, push notifications, and future scalability.

Send a detailed project proposal outlining architecture, key milestones, and the toolset you plan to use.