Build an e-commerce app with AI — from catalog to checkout

An e-commerce app has five layers that must work together before you can take a real order.

Product catalog: category browsing, search with filters (price, category, rating), and a product detail screen with image gallery, variants (size, colour), and a stock indicator. Inventory should be managed from an admin view, not hardcoded.

Cart and saved items: an add-to-cart flow with quantity controls, a subtotal that updates in real time, and a saved-for-later list for signed-in users. Guest carts need to survive a session restart and merge into the account on sign-in.

Checkout: Stripe-powered checkout with address capture, shipping option selection, and order summary confirmation. Do not build a custom payment form — Stripe handles PCI compliance, 3D Secure, and card validation for you.

Order history: a per-user order list with status (pending, processing, shipped, delivered), item breakdown, and a reorder shortcut. This is the most-read screen after delivery — do not skip it.

Admin controls: product create/edit/delete, inventory count, and order status management. You will use this screen every time a customer emails you.

Three mistakes that kill e-commerce MVPs before they take a real order.

Building a custom payment form. Founders spend two weeks wiring a custom Stripe Elements form, handling card validation, and debugging 3D Secure edge cases. Stripe Checkout handles all of this in a redirect. AppGenie wires Stripe Checkout from the first generation — do not replace it with a custom form until you have a product reason to do so.

Skipping the admin view until after launch. Every order generates a support email. Without an admin view, you are looking up orders in a database client. Build order management in the first generation and you will save yourself hours in the first week of sales.

Not planning product variants upfront. Adding size/colour variants to a product data model after launch means a schema migration on live data. AppGenie scaffolds a variant-aware product model from day one — include variants in your prompt even if your first SKU has none, because retrofitting the data model costs more than the extra prompt words.

Traditional timeline: three to five months for a solo developer to build catalog, cart, checkout, order history, admin, and the Stripe integration. Agency cost: $50,000 to $150,000 depending on the number of SKUs, variant complexity, and whether the brief includes a native mobile app alongside the web storefront.

With AppGenie: the catalog, cart, Stripe checkout, order history, and admin scaffolding generate in the first pipeline run — typically three to five minutes for the first live preview. The output is a full Expo + React Native codebase that runs on iOS, Android, and web from the same source. You own the code from day one.

What this means in practice: you spend your first week on the product decisions that actually matter — your category taxonomy, your pricing strategy, your shipping rules — instead of re-implementing the same e-commerce boilerplate that exists in every Shopify theme.

The ongoing cost is your AppGenie subscription plus your backend and payment infrastructure. No Shopify revenue share, no platform lock-in.