Custom Shopify App Development

Shopify App Development

Shopify is a powerful e-commerce platform because of its extensibility through custom apps. With Shopify app development, the possibilities for extending your store are vast, but building apps the right way matters just as much as what they do.

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What do you want Shopify to do for your business?


Need functionality that does not exist in the Shopify App Store? Want to integrate a proprietary system, internal workflow, or third-party API directly into your store? We have built many custom Shopify apps over the years, from ground-up private apps to customizations and extensions of existing solutions. Our developers understand Shopify’s APIs, data models, and best practices, and we focus on building apps that are secure, scalable, and maintainable. If you have a specific idea or business challenge, we can architect and build the right solution for your store.



Custom apps built for your business

While off-the-shelf Shopify apps are often a great starting point, they are not always the right long-term solution. Custom Shopify apps allow your store to operate exactly how your business needs, without unnecessary features, limitations, or recurring per-app costs.

Our custom Shopify apps are built with stability and long-term maintenance in mind. We follow Shopify’s recommended development patterns, use clean and well-documented code, and ensure your app remains compatible as Shopify evolves.

As a development-focused agency, quality assurance is built into every project. Our team performs internal code reviews and testing throughout development to ensure the app is reliable, secure, and production-ready.

Unlike many marketing agencies, Inspry is a development agency with experienced engineers on staff. We focus on building solutions the right way, not shortcuts that cause issues later.



Shopify API and system integrations

Many businesses rely on external systems to run their operations. We have extensive experience building Shopify apps that integrate seamlessly with third-party services, internal tools, and external APIs, allowing your Shopify store to become part of a larger, connected ecosystem. Whether you need to sync data, automate workflows, or power custom storefront experiences, we can design and build a solution that fits your infrastructure.

Custom Shopify App Development

  • Private and custom Shopify app development
  • Shopify REST and GraphQL API integrations
  • Custom checkout, cart, and order workflows
  • Inventory, fulfillment, and ERP integrations
  • CRM integrations for HubSpot, Salesforce, and more
  • Customer, dealer, and wholesale portals
  • Subscription and membership features
  • Custom payment and transaction logic
  • Internal admin tools and dashboards
  • Ongoing support, enhancements, and maintenance

How We Build Custom Shopify Apps

Every custom Shopify app we build follows Shopify’s current standards and tooling. Our developers work with Shopify App Bridge and the Polaris UI framework to create embedded app experiences that feel native to the Shopify admin. We implement OAuth authentication and proper session management so your app handles permissions and token exchange securely from the start.

For data flow, we set up webhook subscriptions that keep your app in sync with Shopify events in real time, whether that is order creation, inventory changes, or customer updates. Depending on your use case, we integrate with the Admin API for back-office operations and the Storefront API for customer-facing functionality like headless storefronts and custom product displays. All deployment and environment management is handled through Shopify CLI, giving us a repeatable process from local development through production.

Shopify regularly releases API version updates and deprecates older endpoints. We provide ongoing support to keep your app current, including version upgrades when new API releases ship, uptime monitoring, and proactive maintenance. When something changes on Shopify’s side, we handle it so your store keeps running without interruption.

Frequently Asked Questions

A custom app makes sense when the functionality you need does not exist in the Shopify App Store, or when existing apps introduce too much bloat, security risk, or workflow friction. Custom apps are also the right choice for integrating proprietary systems, internal tools, or third-party APIs directly into your store.

We build private and custom apps across a wide range of use cases, including custom checkout and cart workflows, admin extensions, wholesale and B2B portals, CRM integrations, and subscription management. If it connects to Shopify’s APIs, we can build it.

We follow Shopify’s API best practices, including proper authentication, scoped permissions, and rate limit handling. Every app is built with clean, documented code so your team or future developers can maintain and extend it. We also test thoroughly across different Shopify plan tiers before launch.

Yes. If you have an existing app that needs new features, bug fixes, or performance improvements, we can work within your current codebase. We start with a code review to assess the current state and then recommend the most practical path forward, whether that is extending what you have or rebuilding specific components.

If you need it,
we can build it.

Contact us to book a free, no-obligation consultation.