Shopify Custom App Development — Bespoke Shopify App for Your Specific Requirements

£2,997–£9,997

Market Rate: £5,000–£20,000

No existing Shopify app does exactly what you need. We build a custom private Shopify app built specifically for your store — extending Shopify’s functionality beyond what themes and public apps can achieve.

✅ What’s Included

🔧 Custom App Architecture — Full custom Shopify app built to your exact specification using Shopify’s official API and app framework
⚡ Shopify Functions — Custom discount logic, shipping rules, payment customisation and checkout extensions built with Shopify Functions
🛒 Checkout Extensions — Custom checkout UI components, upsell blocks, custom fields and checkout customisation beyond standard theme capabilities
🔗 Admin UI Extensions — Custom admin panels embedded directly in Shopify admin for managing your custom functionality
🌐 Storefront API Integration — Custom storefront experiences built on Shopify’s Storefront API
🔄 Webhook Processing — Real-time event processing for orders, customers, products and inventory with reliable webhook handling
🔐 Secure Installation — OAuth app installation flow, proper API key management, GDPR-compliant data handling
🧪 Full Testing Suite — Comprehensive testing across all app functions before deployment
📋 Full Documentation — Technical documentation and operational guide for your team
🔧 30-Day Post-Launch Support — Bugs and issues resolved at no additional cost in the first 30 days

⏱️ Timeline

2–6 weeks depending on complexity.

🎯 Who Is This For?

Stores that need functionality no public app provides. Businesses with unique workflows that require custom automation. Shopify Plus merchants needing advanced checkout customisation.

📞 020 3951 4908

info@bydesignuk.co.uk · bydesignuk.co.uk · Office 13, 25 Mollison Avenue, Enfield EN3 7LW

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