When do we need a custom app instead of one from the App Store?

When no existing app does what you need, when you are stitching several apps together to fake a workflow, or when an app almost fits but you cannot change the part that matters. A custom app does exactly one thing — yours — and nothing else.

Do you build public App Store apps too?

Our focus here is apps for your own store — private and custom apps. We build and run our own public Shopify apps, so we know the platform deeply, but a marketplace launch is a separate kind of engagement.

What do you build custom apps with?

Shopify's supported stack — the Admin GraphQL API, App Bridge, Polaris, webhooks, and Functions and UI extensions where they fit. That keeps the app upgrade-safe as Shopify evolves.

You do. We hand over the repository and document it so your team, or another developer, can maintain it.

Apps and integrations

Custom App Development

We design and build custom Shopify apps — private and embedded admin apps, checkout extensions and back-end services — for the workflows no off-the-shelf app covers.

Start a project See the work

Some problems do not have an app. When your workflow is specific enough that the App Store either cannot help or would take three apps and a spreadsheet to approximate, a custom app is the honest answer — one piece of software that does exactly what your business needs, and nothing it does not.

Apps that feel like part of Shopify

The best custom apps do not feel like bolt-ons. We build them on Shopify’s own tooling — App Bridge and Polaris for the admin, the Admin GraphQL API for data, webhooks for events, and Functions or UI extensions where the work belongs in checkout or the storefront. The result sits inside Shopify admin and behaves the way the rest of the platform does, so your team does not have to learn a separate tool.

Built to last, and yours to keep

We have designed, shipped and maintained our own Shopify apps, so we build yours the same way we build our own: on supported APIs, structured to survive Shopify’s platform changes, and documented so you are never locked to us. You own the code at the end of it.

What we build

Private and custom apps

Purpose-built apps installed only on your store, doing exactly what your team needs and nothing else.

Embedded admin tools

Apps that live inside Shopify admin using App Bridge and Polaris, so they feel native to the people using them.

Checkout and storefront extensions

UI extensions and Functions packaged as an app, extending checkout, the customer account and the storefront.

APIs and back-end services

Webhooks, background jobs and connections to the systems your business already runs on.

Questions, answered

When do we need a custom app instead of one from the App Store?: When no existing app does what you need, when you are stitching several apps together to fake a workflow, or when an app almost fits but you cannot change the part that matters. A custom app does exactly one thing — yours — and nothing else.
Do you build public App Store apps too?: Our focus here is apps for your own store — private and custom apps. We build and run our own public Shopify apps, so we know the platform deeply, but a marketplace launch is a separate kind of engagement.
What do you build custom apps with?: Shopify's supported stack — the Admin GraphQL API, App Bridge, Polaris, webhooks, and Functions and UI extensions where they fit. That keeps the app upgrade-safe as Shopify evolves.
Who owns the code?: You do. We hand over the repository and document it so your team, or another developer, can maintain it.

Ready to build a store worth talking about?

Tell us where your store is today and where you want it to go. We reply within two working days with a clear next step.

Start a project hello@thecheckoutagency.com