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Mobile App - Custom Development Service for Module 10: Catalog / Cart / Payment

Feature goal: Build a complete customer journey - from browsing products in the catalog to checkout and payment, with reliable integration to external payment and logistics services.

(4.9)
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🎉 Price from: $238 ($280)

You save: $42 (15%)

Rates: Junior $8–$12/h | Middle $20–$25/h | Senior $30–$40/h

Hire Developer

Timeline: 3-6 days

What’s included:

  • Layout of the catalog (list / grid / product cards)
  • API for loading the product range (by categories, filters, sorting)
  • Display of key product parameters: name, price, images, availability
  • Cart layout (add, remove, edit quantity)
  • Counters, total cost, delivery
  • Local and server-side storage of cart contents
  • Layout of checkout screen and payment form
  • Integration with payment systems (Stripe, LiqPay, Apple Pay, Google Pay, etc.)
  • Integration with order API, status confirmation

Testing (available at extra cost):

  • Testing the full user flow: from browsing to payment
  • Error handling: empty cart, unavailable product, failed payment
  • Validation of repeat purchases, redirects, and confirmations
  • Edge cases: payment cancellation, slow connection, switching currencies / languages

Additionally (available at extra cost):

  • Integration with CRM and logistics
  • Promo codes, discounts, upsell scenarios
  • Abandoned cart tracking
  • Sending receipts / invoices by email
  • Multi-currency support and tax calculation
  • A/B testing for product cards and checkout pages

Work examples

mobile screen displaying product catalog in grid layout with images, prices, and quick add-to-cart buttons

Frequently Asked Questions

How does the module work?

After you select the Catalog/Cart/Payment module, you’ll provide details about your products, checkout flow, and payment preferences. A developer then implements the full journey - from catalog browsing to completed order.

Who does the work?

Verified freelance developers (Junior, Middle, or Senior) carry out the tasks. You can choose the level of expertise that fits your budget and timeline.

What will I receive?

A fully functional catalog, shopping cart, and checkout flow - including product filtering, item counters, payment integration, and responsive mobile design. Everything is tested end-to-end.

Can I customize the module?

Yes. You can define catalog layouts, cart behavior, payment providers, shipping options, and even add extras like promo codes or upsell scenarios. Developers adapt it to your requirements.

What if I need help defining my requirements?

Our AI Product Manager Assistant can guide you through the options (catalog design, payment providers, delivery setup) and prepare a clear, developer-ready specification.

About this offer

Suitable for online shops, digital products, and startups aiming to launch a complete purchase flow fast. This module covers catalog display, cart management, and secure checkout with payment integrations - ensuring a smooth shopping journey. Optimized for mobile, scalable for larger inventories, and ready for API connections. Typical clients: eCommerce founders, SaaS providers, retailers, and product-focused startups. Supports multi-currency, CRM links, and A/B testing of checkout funnels.

Join for Early Access

⚡ Limited offer — only before public launch.

🎉 Early Supporter Deal

Get pre-launch access to the AI Product Manager Assistant and save:

  • –25% $11/month $14.99/month
  • –45% $99/year $180/year
  • Help shape the tool, get exclusive benefits, and be the first to try it.
  • "Private beta access" или "Direct feedback loop with the team"
Buy with discount $11/month Buy with discount $99/year

Frequently Bought Together

desktop view of homepage with hero banner and top navigation menu $161.5 ($190)
E‑commerce - Custom Development Service for Module 1: Home Page desktop view of product catalog with grid layout, product cards displaying image, title, and price $110.5 ($130)
E‑commerce - Custom Development Service for Module 2: Product Catalog desktop view of product filtering panel with brand and price filters applied in real time $119 ($140)
E‑commerce - Custom Development Service for Module 3: Filtering & Search desktop view of product page featuring prominent add-to-cart button with smooth animation on click $127.5 ($150)
E-commerce - Custom Development Service for Module 4: Product Page desktop view of animated Add to Cart button with visual state change after clicking $85 ($100)
E‑commerce - Custom Development Service for Module 5: Add to Cart desktop interface showing animated add-to-cart button with confirmation visual effect $136 ($160)
E‑commerce - Custom Development Service for Module 6: Shopping Cart desktop view of checkout module showing step-by-step form with personal info and delivery options $153 ($180)
E‑commerce - Custom Development Service for Module 7: Checkout desktop preview of legal policy page with table of contents and anchor navigation for quick section access $85 ($100)
E‑commerce - Custom Development Service for Module 20: Return Policy, Privacy Policy, and Terms of Service

Customers say

Clients value this module as a ready-to-go eCommerce backbone, combining catalog, cart, and checkout in one seamless flow. They highlight its clear structure, flexible layouts, and reliable payment integrations, which help reduce cart abandonment. Many note that the mobile-optimized design and quick loading speed significantly improve conversion rates. Business owners especially appreciate the built-in error handling and order confirmations that enhance trust. Startups emphasize that it allowed them to launch sales rapidly without additional complexity, while established brands benefit from its scalability, API support, and ability to integrate with CRM or logistics.