Public App Store apps
From idea to a live, revenue-generating listing — billing, onboarding, OAuth, webhooks and a clean Polaris UI, submitted to pass App Store review.
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Shopify app development studio
Shopify apps, simplified.
We design, build and launch the apps that power great Shopify stores — public App Store apps, custom merchant tools, checkout extensions and integrations. One specialist team, from idea to live listing.
Built for Shopify standards
You own the code
Fixed-scope quotes
Simplify · embedded app
Order Guardian
$48,210
Fraud blocked (30d)
1,204
Orders screened
Auto-flag high-risk orders
Hold & notify on review
Sandbox / test mode
Save
Built for ShopifyReview-ready on day one
What we build
Everything that lives in the Shopify ecosystem.
From a single checkout tweak to a full App Store launch — we build it natively, the way Shopify intends.
Custom & private apps
Bespoke tools for a single store or Plus org — automations, dashboards and back-office workflows tailored to exactly how you operate.
Learn more →Checkout extensions & Functions
Custom discounts, shipping and payment logic, and checkout UI extensions for Shopify Plus — fast, server-side and upgrade-safe.
Learn more →Theme app extensions
App blocks and embeds merchants drop into the theme editor — no Liquid edits, no broken updates, Online Store 2.0 ready.
Learn more →Integrations & APIs
Connect Shopify to your ERP, 3PL, CRM, ESP or payment provider with resilient sync, retries and webhook pipelines that don't drop data.
Learn more →App rescue & maintenance
Inherited a messy codebase or failing app? We audit, stabilise and take over — then keep it healthy with ongoing support and updates.
Learn more →
How we work
A clear path from idea to App Store.
No black boxes. You see working software every sprint and own the repo from commit one.
1
Discovery & scope
We map the merchant problem, the data model and the Shopify APIs involved, then write a fixed scope and quote.
2
Design & architecture
Polaris-native UX and a sound architecture — billing, auth, webhooks and rate-limit strategy decided up front.
3
Build in sprints
Shipped in weekly increments on a dev store you can click through. Clean, reviewed, documented code.
4
Review & launch
We handle App Store submission and Built for Shopify checks — or deploy your custom app straight to your store.
5
Support & growth
Monitoring, updates for Shopify API versions, and a roadmap to keep improving conversion and ratings.
Selected work
Apps that move the metrics that matter.
A sample of the kinds of Shopify apps we design and build. See all work →
Public app · Risk & fraud
Order Guardian
A fraud-screening app that flags risky orders, holds them for review and writes order risk back to the Shopify admin in real time.
Checkout · Shopify Plus
ShipSmart Rules
A Shopify Functions build delivering custom shipping & discount logic at checkout for a Plus merchant moving 40k orders a month.
Custom app · Operations
Restock Brain
A private inventory-forecasting app that syncs with a 3PL and ERP, predicting reorders and creating draft POs inside Shopify admin.
Theme extension · Marketing
Loyalty Blocks
A theme app extension giving merchants drag-and-drop loyalty and rewards blocks for the theme editor — no developer required.
60+
Shopify apps shipped
12+
Years on the platform
4.8★
Avg. App Store rating
100%
Code ownership to you
Why Simplify
Shopify is all we do.
We're not a generalist agency that also dabbles in Shopify. The platform's APIs, review process and merchant expectations are our entire focus.
Built for Shopify, by default
We build to the App Store review guidelines and Built for Shopify criteria from the first commit — so launch isn't a cliff.
Senior engineers only
The people scoping your app are the people writing it. No hand-off to juniors, no offshore mystery team.
Fixed scope, no surprises
You get a written scope and a fixed quote before we start. Change your mind mid-build? We re-quote transparently.
You own everything
The repository, the app, the IP — all assigned to you on final payment. No lock-in to a proprietary platform.
Fast, predictable delivery
Most MVP apps go from kickoff to a working build in weeks, not quarters — shipped in clickable weekly increments.
We think about growth
Apps that convert installs to paying merchants: clean onboarding, sensible billing, and the analytics to improve both.
“
They understood Shopify's quirks better than we did. Our app passed review first time and was earning recurring revenue within a month of launch.Sample testimonialFounder · DTC apparel brand
Have a Shopify app in mind?
Tell us what you're trying to build. We'll come back within one business day with honest feedback and a sense of scope.