App Store apps that almost do what you need
Most public apps are built for the average merchant. When your store needs something specific, you end up paying a monthly fee for an app that still leaves a 20% gap you have to work around.
Shopify App Development
Shopify App Development Services
We design and build Shopify apps from scratch, on current Shopify APIs and Checkout Extensibility. No deprecated workarounds, no bloated subscriptions, just clean functionality that belongs to you and keeps working through every Shopify update.
- Current Shopify APIs
- Security By Default
- You Own The Code
- Long-Term Support
0+ Years of combined experience
0+ Shopify apps delivered
0% Client satisfaction
0/7 Monitoring & support
The cost of the wrong app
Is an App Store subscription creating more problems than it solves?
If any of these feel familiar, a custom app is not a luxury, it is the fix. Every one of these problems is solvable with the right approach.
Too many apps slowing your storefront down
Every installed app injects scripts into your theme. Stack enough of them and checkout speed and Core Web Vitals start dropping, costing you conversions you never see in a report.
No real integration with your other systems
Off-the-shelf apps do not know about your ERP, your 3PL or your internal tools. A custom app connects Shopify to the rest of your business stack properly, not through a brittle Zapier chain.
Checkout and admin UX that fights your workflow
Generic app settings rarely match how your team actually operates. A custom app is designed around the exact admin screens and checkout extensions your store needs.
Per-order or per-feature fees that punish growth
Many App Store apps charge more as your order volume grows. The tool that was supposed to support scale becomes a tax on your best months.
No ownership of functionality your store depends on
When checkout, pricing or fulfillment depends on a third-party app you do not own, a pricing change or an app being delisted can break your store overnight.
Built with proven tools
Technologies we work with
We use Shopify's native APIs and frameworks and only bring in external libraries where they genuinely add value and are maintained.
Sh Shopify API
GQL GraphQL
AB App Bridge
Po Polaris
Fn Shopify Functions
No Node.js
Re React
Rx Remix
TS TypeScript
Lq Liquid
API REST API
Wh Webhooks
Pg PostgreSQL
Rd Redis
Pr Prisma
Do Docker
AW AWS
Vc Vercel
St Stripe
Gi Git
What we build
Our Shopify app development services
From a focused checkout extension to a multi-feature app with billing and embedded admin screens, every project starts from a blank file.
Custom Shopify App Development
Custom public or private Shopify apps built from scratch on the latest Shopify APIs, scoped around the exact problem your store or your merchants need solved.
Embedded Admin Apps
Apps embedded directly in the Shopify admin using App Bridge and Polaris, so merchants get a native-feeling experience instead of a separate dashboard.
Checkout UI Extensions
Custom checkout extensions built on Shopify's Checkout Extensibility framework, adding upsells, custom fields or validation without ejecting from Shopify's hosted checkout.
Admin & Theme App Extensions
App blocks and extensions that surface inside the theme editor or admin, giving merchants drag-and-drop control without you touching their theme code directly.
Webhook & API Integration
Apps that integrate Shopify with your ERP, 3PL, accounting or CRM through REST, GraphQL and webhooks, so orders, inventory and customer data sync automatically.
Shopify Functions Development
Custom discount, shipping and payment customization logic written as Shopify Functions, running server-side without slowing down the storefront.
App Store Submission & Billing
Apps prepared for Shopify App Store listing, including the Billing API for recurring or usage-based charges, so submission and monetization are not an afterthought.
Security & Data Protection
OAuth, HMAC verification, scopes scoped to the minimum required and GDPR-aware data handling built in from day one, not patched in before a security review.
Performance Optimization
Apps engineered to add functionality without dragging down storefront speed or Core Web Vitals, including efficient API usage that respects Shopify's rate limits.
Multi-Store & Plus Support
Apps built to handle multi-location inventory, B2B catalogs and the higher API and customization ceiling that Shopify Plus merchants need.
App Audit & Refactor
Existing apps audited for deprecated API usage, security gaps and performance issues, then refactored to current Shopify standards.
Maintenance & Support
Ongoing updates as Shopify ships new API versions, plus a fast helpdesk that keeps your app working as the platform evolves.
Who we work with
Industries we serve
We have delivered Shopify apps across regulated, fast-moving and high-volume retail sectors. We learn your storefront before we build for it.
Healthcare
Financial Services
Education
Hotels & Hospitality
Real Estate
Manufacturing
Logistics
Startups
Agencies
Professional Services
Why choose us
Shopify app development done the right way
Anyone can call the Shopify API. We engineer apps that are secure, lean, compatible with the next API version and fully owned by you, then stay around to maintain them.
Start your project-
Built on Shopify's current APIs
Every app is built on the latest GraphQL Admin API, App Bridge and Checkout Extensibility, so it behaves predictably and is not sitting on a deprecated API version waiting to break.
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Security by default
OAuth flows, HMAC verification and minimal scope requests are part of every build, not bolted on after an app review flags a gap.
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Lean by design
API calls are batched and rate-limit aware. Storefront scripts load conditionally. Your app adds functionality without dragging down checkout speed.
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Connected to your stack
We integrate with your ERP, 3PL, accounting and CRM through webhooks and APIs, so Shopify becomes part of your operation instead of an island.
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App Store ready
We build with Shopify's App Store review requirements in mind from day one, including the Billing API, so submission is not a scramble at the end.
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You own the code
Full IP assignment on every contract. The app belongs to you outright, with no recurring licence fee on functionality built for your own store.
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Overlap with your hours
Three to four hours of daily overlap with US, UK and Canada time zones, so demos and decisions happen in your working day.
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Long-term compatibility
We keep your app updated as Shopify ships new API versions, so a deprecation notice does not turn into a broken checkout six months later.
How we work
Our Shopify app development process
Eight clear stages, each with a visible output you can review and approve. No black box between kickoff and launch.
- 01
Discovery
We map the merchant or store workflow, the admin experience and the exact extension points the app needs to use.
- 02
Architecture
API approach, data model, scopes and billing model agreed and documented before a line of code is written.
- 03
UI Design
Admin screens and checkout extensions designed in Polaris patterns and reviewed before development starts.
- 04
Development
Clean, documented code built on Shopify's current APIs, with demos at every milestone.
- 05
QA & Testing
Cross-theme, cross-plan and edge-case testing before submission or deployment to a private store.
- 06
Launch
Deployed to your store or submitted to the Shopify App Store with review requirements met.
- 07
Review Support
Any reviewer feedback addressed quickly so your listing is approved without unnecessary back-and-forth.
- 08
Support
Ongoing updates and compatibility checks as Shopify ships new API versions.
What is included
A monthly subscription is not the same asset
The difference between an App Store subscription and a custom-built app is everything that happens under the surface. Here is what comes standard with every app we deliver.
What you get App Store app Devlon StedyDesk
Built around your exact storefront
Full IP ownership, no recurring licence
Security & scopes hardened from day one
Rate-limit aware, checkout-speed safe
Built on current Shopify APIs
Shopify Plus & multi-location ready
Integrated with your existing stack
Basic app functionality
Generic settings page
Post-launch support & updates
Client words
Trusted by merchants that depend on their Shopify apps
We needed a checkout extension that applied a loyalty discount our App Store options could not replicate. The custom build paid for itself inside the first month from recovered margin.
Our old app stack was costing us more every month as orders grew. The private app they built replaced three subscriptions and the fee structure stopped punishing us for selling more.
Inventory sync between Shopify and our 3PL used to need a manual check every morning. The integration app they built has not needed a single manual correction since launch.
Questions, answered
Shopify app development FAQs
How much does a custom Shopify app cost?
Most custom app projects land between $4,000 and $50,000 depending on complexity and the number of integrations. A focused checkout extension or admin tool sits at the lower end; a full app with billing, an embedded admin UI and third-party integrations sits higher. Every quote is itemized before work begins.
How long does a Shopify app take to build?
A focused single-feature app or extension typically takes 3 to 6 weeks. A multi-feature app with embedded admin screens, webhooks and billing usually runs 8 to 14 weeks. You see a working build early and a demo every sprint.
Should we build a public App Store app or a private app?
It depends on whether you are solving a problem for your own store or for other merchants. Private apps are faster to ship and skip App Store review. Public apps reach other merchants but need to meet Shopify's review and billing requirements. We will recommend the right fit honestly.
Can you build checkout customizations now that checkout.liquid is deprecated?
Yes. We build on Shopify's Checkout Extensibility framework using checkout UI extensions and Shopify Functions, which is the only supported path for checkout customization going forward and works across Shopify Plus and standard plans where eligible.
Will the app slow down our storefront?
We engineer apps to be rate-limit aware and to load conditionally, so functionality is added without dragging down storefront speed or Core Web Vitals. Performance is tested before launch, not assumed.
Can the app integrate with our ERP, 3PL or accounting software?
Yes. Webhook and API integration is one of the most common reasons clients commission a custom Shopify app. We connect Shopify to your existing business systems so orders, inventory and customer data sync automatically.
Will the app stay compatible as Shopify updates its APIs?
We build on current, non-deprecated API versions and avoid workarounds that are likely to break. Our maintenance plans also include testing and updates each time Shopify ships a new API version.
Can you add features to an app we already have?
Yes. We audit the existing app first, identify any deprecated API usage or technical debt that needs addressing, then build new features on a clean foundation so they do not introduce instability.
Do you handle App Store submission and review?
Yes. We prepare the app to meet Shopify App Store review guidelines, implement the Billing API correctly for your pricing model, and handle reviewer feedback until the listing is approved.
Do you build apps for Shopify Plus merchants?
Yes. We build apps that take advantage of the higher API limits, multi-location inventory and B2B features available on Shopify Plus, where your store's plan calls for it.
Do you provide maintenance after the app launches?
Yes. Our maintenance plans cover Shopify API version compatibility, security patches, bug fixes and a monthly bucket of improvement hours, with most issues resolved overnight your time.
What happens after the app launches?
Every project includes a handover, documentation and a warranty window for fixes. Most clients move onto a maintenance plan so the app stays current as Shopify evolves. We are still available for version two, not just while the invoice is open.
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ExploreReady to build a Shopify app that actually fits your store?
Tell us what you need. You will get a straight answer on scope, cost and timeline, usually within one business day. No fluff, no obligation.