Custom Shopify App Development

Build the exact Shopify tool your brand needs

Gapstow’s Custom Shopify App Development service is for brands that have outgrown off-the-shelf solutions. Whether you need custom logic, a proprietary feature, or an internal operations tool, we develop scalable, secure, and fully integrated Shopify apps tailored to your business goals. Built to work seamlessly with your existing tech stack, our apps extend Shopify’s capabilities—without breaking core functionality or creating long-term maintenance headaches.

While custom development needs exist at all levels, Gapstow specializes in helping mid-market brands ($5–15M in revenue) solve operational inefficiencies, unlock new customer experiences, and reduce app dependency through bespoke development. The result? A leaner, smarter, more scalable business engine.

WhO

Benefits?

If you're duct-taping multiple apps together, fighting recurring subscription costs, or unable to execute a key initiative because "there’s no app for that," custom development may be the right path. Custom Shopify apps are also ideal for brands with unique product logic, advanced fulfillment rules, B2B workflows, or headless storefront needs.

Brands of all sizes face these challenges, but our focus is on growing businesses that need strategic tech to scale. If you're doing $5–15M annually and feel limited by your tools, we can build the bridge between where you are and what’s next.

What's

Involved?

Build the exact Shopify tool your brand needs

  • Requirements Discovery & Technical Scoping
    Deep dive into your business needs, goals, and system dependencies to define the right build.
  • Shopify-Approved App Architecture
    Clean, scalable code that aligns with Shopify’s security, performance, and partner standards.
  • Private or Public App Development
    Build internal tools, integrations, or customer-facing functionality—tailored to your workflow.
  • API & System Integrations
    Connect Shopify with ERPs, CRMs, 3PLs, or custom back-office tools through secure integrations.
  • User Interface & Admin Panel Design
    Develop intuitive dashboards or customer interfaces for seamless usage and management.
  • Launch, Testing & Maintenance Support
    Deploy, QA, and maintain your app with confidence—no fragile builds, no vendor lock-in.