E-Commerce App Development
Statista projects the global e-commerce market will reach $6.3 trillion in 2026. App369 builds custom e-commerce platforms and mobile shopping apps with Shopify integration, Stripe payments, and conversion-optimized checkout flows that turn browsers into buyers.
Mobile, web, UX, consulting, and AI delivery under one product engineering team.
Full-stack product delivery across mobile, web, UX, consulting, and AI.
E-Commerce Development Services
Custom E-Commerce Platforms
Fully custom e-commerce solutions built with modern frameworks and headless architecture. We build product catalogs, checkout flows, and admin dashboards tailored to your business model — from direct-to-consumer brands to multi-vendor marketplaces.
Shopify Customization
According to BuiltWith, Shopify powers over 4.4 million stores worldwide. We build custom Shopify themes, private apps, and headless storefronts using the Storefront API for brands that want Shopify's backend reliability with a fully custom frontend experience.
Payment Gateway Integration
PCI DSS compliant payment integration with Stripe, PayPal, Apple Pay, Google Pay, and regional payment methods. According to Baymard Institute, offering multiple payment options reduces cart abandonment by 6%. We implement 3D Secure for fraud prevention.
Inventory Management Systems
Real-time inventory tracking across multiple warehouses and sales channels with automated low-stock alerts, purchase order generation, and barcode/SKU management. Our systems sync with Shopify, Amazon, and custom fulfillment providers.
Order Fulfillment Systems
Automated order processing from purchase to delivery with real-time tracking, shipping label generation via ShipStation or EasyPost, returns management, and customer notification emails at every stage of the fulfillment pipeline.
Analytics & Conversion Dashboards
Custom analytics dashboards tracking revenue, conversion rates, average order value, customer lifetime value, and product performance. We integrate Google Analytics 4, Mixpanel, and custom event tracking to identify optimization opportunities.
Our Process
Market Research & Strategy
We analyze your target market, competitors, and revenue model to define the optimal e-commerce architecture — whether Shopify, headless commerce, or fully custom — along with payment, shipping, and inventory requirements.
UX Design & Conversion Optimization
Our designers create conversion-optimized shopping experiences with intuitive product browsing, streamlined checkout flows, and mobile-first responsive design validated through user testing.
Platform Development
Our developers build your e-commerce platform with product catalog management, payment integration, real-time inventory tracking, order management, and Algolia-powered search with faceted filtering.
Testing & Security Audit
Comprehensive testing including payment flow testing with Stripe test mode, load testing for traffic spikes, PCI DSS compliance verification, and cross-browser/cross-device QA.
Launch & Marketing Setup
We deploy your store, configure analytics and conversion tracking, set up email marketing automation for abandoned cart recovery, and integrate with social commerce channels.
Growth Optimization
Ongoing A/B testing of checkout flows, product page optimization based on analytics, inventory system scaling, new payment method integration, and feature additions driven by customer behavior data.
Frequently Asked Questions
How much does it cost to build an e-commerce app?
According to Clutch's 2024 survey, custom e-commerce app development costs range from $25,000 to $250,000 depending on complexity. A Shopify-based storefront with custom theme costs $15,000-$40,000, a custom e-commerce platform with inventory management and payment integration runs $50,000-$120,000, and enterprise marketplace platforms with multi-vendor support can exceed $150,000. Mobile commerce apps built with Flutter add $20,000-$60,000 depending on features.
Should I use Shopify or build a custom e-commerce platform?
According to BuiltWith, Shopify powers over 4.4 million stores worldwide. Choose Shopify if you need a proven platform with built-in payment processing, inventory management, and a vast app ecosystem — ideal for launching quickly. Choose custom if you need unique checkout flows, complex product configurations, multi-vendor marketplace features, or full control over the tech stack. App369 also builds headless Shopify storefronts using the Storefront API for the best of both worlds.
What payment gateways do you integrate?
According to Stripe, they process hundreds of billions of dollars annually for millions of businesses. App369 integrates Stripe for credit card and ACH payments, PayPal for buyer-protected transactions, Apple Pay and Google Pay for one-tap mobile checkout, Shopify Payments for Shopify stores, and regional payment methods as needed. All integrations are PCI DSS compliant, and we implement 3D Secure for fraud prevention.
How long does it take to build an e-commerce platform?
According to GoodFirms research, e-commerce platform development takes 3-9 months depending on complexity. A Shopify store with custom theme takes 4-8 weeks, a custom e-commerce website with product catalog and checkout takes 3-5 months, and a full marketplace platform with vendor management, real-time inventory, and mobile apps takes 6-12 months. App369 uses agile sprints to deliver functional increments every 2 weeks.
What mobile commerce trends should I consider?
According to Statista, mobile commerce accounts for 73% of all e-commerce sales globally and is growing at 25% year-over-year. Key trends include one-tap checkout with Apple Pay and Google Pay (reducing cart abandonment by 35% according to Baymard Institute), social commerce integration with Instagram and TikTok Shop, AR try-on features, AI-powered product recommendations, and voice commerce. App369 builds mobile-first e-commerce experiences optimized for these trends.
What features should my e-commerce app include?
According to Baymard Institute research, essential e-commerce features include product search with filters (used by 43% of shoppers), user accounts with order history, multiple payment methods (reduces abandonment by 6%), guest checkout (70% of shoppers prefer it), push notifications for order updates, wishlist functionality, product reviews, real-time inventory display, and streamlined checkout with address autocomplete. App369 implements all of these as standard features.
Start Selling Online Today
Mobile commerce now accounts for 73% of all e-commerce sales (Statista). Whether you need a custom storefront or a Flutter-based mobile shopping app, get a free consultation and detailed estimate within 2 business hours.