Custom Shopify App Development
Purpose-built Shopify apps you own and control. When an off-the-shelf app can't do what your store needs, we build one that can: no monthly app-tax, no feature bloat, no compromise.
Delivered by the same embedded team that runs the rest of your Build Grow Scale engagement.
$1B+
in client revenue managed
2,500+
brands
10+
years on Shopify
What is Custom Apps?
Every growing Shopify store eventually hits the same wall: the app it needs either doesn't exist, costs more than it should, breaks at scale, or only covers 80% of what the business actually needs. Stacking three more apps to fill the gaps just makes the problem worse.
Custom Apps gets a store off that app-stack treadmill. We build Shopify-native apps tailored to the exact workflow in front of us: apps the store owns, that don't charge per month, and that do exactly what's needed and nothing else.
Common targets: bundling logic, subscription edge cases, custom checkout flows, admin tooling, internal dashboards, and the one-off automation that would be obvious in hindsight if anyone had built it.
The deliverables.
Scoping & Technical Design
What to build, decided before we build it. Architecture, edge cases, and scaling considerations, documented.
Shopify-Native Development
Built on Shopify's own app framework: Polaris for UI, App Bridge for embedding, Functions for checkout extensibility.
Checkout Extensions
Where Shopify allows it: custom checkout logic, upsells, validations, dynamic shipping rules, and similar.
Theme Blocks & Sections
Custom storefront components that integrate cleanly with the existing theme and survive theme updates.
Admin Tooling
Internal tools for the ops team: bulk operations, custom workflows, reporting tools built around the actual business.
Documentation & Handoff
Code documented and the deployment process recorded, so the client's team can maintain it, or we keep running it on retainer.
The process.
01
Discovery & Scoping
What problem are we actually solving, and what's the simplest thing that solves it? Off-the-shelf options get ruled out first.
02
Technical Design
Architecture, data model, integration points, and failure modes, reviewed before a line of code is written.
03
Build & QA
Built in sprints with weekly visibility. QA runs across browsers, devices, and Shopify themes.
04
Deploy & Hand Off
Launched to the store, documentation delivered, and the client's team trained on maintenance, or we keep it running on retainer.
Is this right for you?
Strong Fit
- Paying $500+/month for apps that don't quite fit
- Have a workflow no off-the-shelf app supports
- At a scale where custom is cheaper than the app tax
- Need a competitive moat competitors can't just install
Probably Not If
- A free or $20/mo app already does what's needed
- It needs to be built in a week
- There's no one internally who can scope what success looks like
Common Questions
What does Build Grow Scale's custom Shopify app development include?
It covers scoping and technical design, Shopify-native development using Polaris and App Bridge, checkout extensions, custom theme blocks, internal admin tooling, and full documentation and handoff: everything needed to replace an app-stack workaround with one purpose-built app.
Do I own the app you build for me?
How is a custom app different from installing another app from the Shopify App Store?
Does Build Grow Scale handle advertising or campaign work as part of a custom app engagement?
How long does a custom Shopify app take to build?
Related services.
$1B+ in client revenue
managed. Let's
talk about yours.
A free 30-minute call to look at your store's data and conversion funnel together.
No obligation. No pressure.