Web app development cost for e-commerce & retail

There is no single figure, and quoting one would be the least useful thing this page could do — the same pairing spans several-fold depending on scope, compliance and how many surfaces you ship. What this page gives you instead is what the pairing demands: the regimes that may apply, the systems of record you will be asked to integrate with, the device matrix and the release path. The calculator below is already fixed to Web and e-commerce & retail — answer what is left and it returns a cost range, hours, timeline, team and running costs for your scope.

Because e-commerce & retail brings its own obligations before you write a feature: PCI DSS, ADA accessibility, CCPA / CPRA may apply, you will be asked to integrate with systems like Stripe and Shopify, and there are typically 6 distinct roles rather than one. The platform contributes its own separate costs — the device matrix, installers and code signing — and those are independent of the industry.

Yes, for equivalent functionality, and the gap is wider than the build figures suggest. One web codebase replaces two mobile ones, there is no store review in your release path, no commission on revenue, and you can ship a fix in minutes rather than waiting on review. You give up reliable push, offline behaviour and hardware access. If your product does not need those, web-first is both cheaper and faster, and you can add mobile later against the same backend.

A PWA closes part of the gap — installable, offline-capable, and on Android it can do push notifications properly. On iOS the story is weaker: push works only for home-screen-installed apps, background capability is minimal, and discovery through the App Store is absent. PWAs are a strong fit for business tools, internal software and markets where Android dominates. They are a poor fit for consumer products that depend on notification-driven engagement or on being found in a store.

Use a platform unless you have a specific reason not to. Shopify plus a headless front end covers what most stores need, and it absorbs PCI scope, tax calculation and fraud screening. Build custom when your pricing, bundling or fulfilment logic cannot be expressed in a platform, when you are running a marketplace rather than a store, or when the buying experience itself is your differentiator. A common middle path is a platform for commerce plumbing and a custom app for the experience.

Against an existing web store, native apps typically add 50–70% rather than doubling cost, because the catalogue, cart, orders, payments and admin already exist — you are paying for client surfaces and store distribution. What you get is push notifications that actually reach people, saved payment with biometric confirmation, and better repeat-purchase behaviour. For a store with meaningful repeat purchase it is usually worth it; for a considered one-off purchase it usually is not.