Custom mobile apps
for established
ecommerce brands.

Your ecommerce business already has traction. Give it a mobile experience. We build custom iOS and Android apps for established ecommerce brands, connected to the systems you already use.

4+ years engineering experience iOS + Android
Discuss your app See what we build
Illustration of a mobile phone wrapped like a gift, with balloons floating nearby

What your customers
can do.

Every reason to open the app again, built on your existing store.

Shop

Browse products, collections, variants and search through a fast native mobile experience.

Buy

Cart, checkout and payments connected to your existing ecommerce infrastructure.

Manage their account

Profile, addresses, order history and account information.

Come back

Push notifications for launches, promotions, restocks and relevant updates.

Experience your brand

Custom navigation, interactions, animations and UX designed for mobile.

We don't rebuild your business.
We build on top of it.

Your existing ecommerce platform remains your source of truth. We integrate with the APIs and systems you already depend on.

Your products, customers, inventory and orders continue working as they do today. Our job is the mobile experience.

Understand your store.
Build the app around it.

Typical projects take 4 to 8 weeks, depending on scope.

01 Understand

We review your existing store, customer journey and technical setup.

02 Plan

We define what the app actually needs, and what it doesn't.

03 Build

We develop the iOS and Android experience around your existing infrastructure.

04 Test

Real devices. Real flows. Real edge cases.

05 Launch

We prepare and publish the app to the App Store and Google Play.

Scoped to your store.
Built on what you have.

For established ecommerce brands ready to bring their store to mobile.

Ecommerce Mobile App Build
Custom iOS & Android App on Your Existing Store

Best for established Shopify brands with real repeat customers and no app, or one that's falling behind.

Scoped per project
4–8 Weeks · iOS + Android
What's included
  • Custom iOS & Android app built on the Shopify Storefront & Customer Account APIs
  • Product browsing, search, cart & checkout
  • Customer accounts, order history, order status, wishlist
  • Push notifications & promotions
  • Loyalty & subscription features where relevant
  • App Store & Google Play submission ready
  • No backend rebuild your existing store stays the source of truth
Tech stack
Expo React Native TypeScript Shopify Storefront API Shopify Customer Account API
Book a call Email me Fixed scope · built on your existing store

A concept build,
done the same way.

No client case study yet. Here's a demo build on a Shopify development store, done exactly the way a real project would be.

Concept build: beauty & skincare ecommerce app
A demo iOS and Android app built against a Shopify development store, covering the full customer journey: browsing, cart, checkout, accounts, and push notifications.
Concept project, not a live client. Built to demonstrate the approach before the first real engagement, per the founding-client offer.
Expo React Native Shopify Storefront API Shopify Customer Account API

Modern tools.
Built on your store.

Powered by agentic engineering, including Claude Code, for rapid iteration on top of your existing ecommerce backend.

Expo React Native TypeScript Shopify Storefront API Shopify Customer Account API App Store Connect Google Play Console Claude Code how I build, not just what I build with

Not sure if your business
needs an app?

That's fine. We don't believe every ecommerce business should have one.

If you already have an established customer base and meaningful repeat purchases, we'll look at your current setup and tell you whether a mobile app actually makes sense.

No unnecessary rebuild. No generic template. No app just for the sake of having one.

Your store already works.
Let's build what comes next.

Tell us about your business, your current ecommerce platform, and what you want your mobile experience to do.

Start a conversation founder@jisrcommerce.com