What is the difference between a private Shopify app and a public app?

A private Shopify app is built exclusively for one store — it accesses the Shopify Admin API without going through the Shopify App Store review process. It's faster to build and ideal for custom integrations with internal tools, ERPs, or India-specific services like Razorpay or Shiprocket. A public app is listed on the Shopify App Store and can be installed by any merchant — it requires Shopify's review and approval process and is suitable for SaaS products targeting multiple merchants.

How long does custom Shopify app development take?

A simple private app or theme extension typically takes 2–4 weeks. A mid-complexity app with Admin UI, webhooks, and third-party API integration takes 4–8 weeks. Full public app development for the Shopify App Store takes 8–16 weeks depending on feature scope. All timelines are confirmed in the project proposal after a discovery call.

Can you integrate our ERP or warehouse system with Shopify?

Yes. We build custom private apps that sync Shopify orders, inventory, and customer data with ERPs like SAP, Tally, Unicommerce, and custom warehouse management systems. The integration uses Shopify's REST and GraphQL Admin APIs combined with your ERP's API or webhook endpoints.

Do you build Shopify theme app extensions?

Yes. Shopify theme app extensions allow apps to inject sections, blocks, and UI elements into a merchant's theme without modifying theme code — which means they survive theme updates. We build extensions for loyalty widgets, custom product options, size guides, review displays, and any feature that needs to appear in the storefront.

What technologies do you use to build Shopify apps?

We build Shopify apps using the official Shopify CLI and Remix framework for embedded app UI, Shopify's REST and GraphQL Admin APIs for data access, Polaris for Admin UI components, and theme app extensions for storefront injection. Backend services are built on Node.js or Python depending on integration requirements.

Get Custom Shopify App Development with API Integration

Shopify App Dev · Private & Public Apps

Custom Shopify App Development for Indian D2C Brands

We are a leading Shopify App Development Company and create custom apps when ready-made apps don't do the job. Our Custom Shopify App Development covers private apps, theme extensions, and advanced Shopify API Integration - from ERP and payment systems to logistics and automation built specifically for Indian D2C workflows.

Discuss Your App Free Store Audit

Shopify CLI & Remix

REST & GraphQL APIs

Fixed price always

razorpay-sync.js

// Custom Razorpay ↔ Shopify sync app

const shopify = require('@shopify/api');

async function syncPayment(event) {

const { orderId, upiRef } = event;

await shopify.order.update({

id: orderId,

tags: ['razorpay-verified'],

note: `UPI: ${upiRef}`

});

triggerWhatsApp(orderId);

}

// ✓ Deployed · 1,200 orders/day

App Types

Three Types of Shopify Apps We Build

Different use cases require different solutions. As a leading Shopify App Development Company, we recommend the right architecture based on your business needs.

Most Common 🔒

Private Apps

Custom-built apps for your store with Shopify API Integrations - no App Store approval required.

ERP & WMS integrations

Custom order routing logic

Internal dashboards & reporting

Razorpay / PayU automation

Backend workflows & operations

Typical timeline: 2–6 weeks

Storefront-Facing 🧩

Theme App Extensions

Custom Shopify App Development to enhance your store's front-end, scalable to fit your needs.

Custom product option builders

Loyalty & rewards widgets

Size guides & calculators

Trust badges & USP sections

COD availability logic

Typical timeline: 2–4 weeks

SaaS Product 🌐

Public App Store Apps

Complete apps for the Shopify App Store with secure APIs and multi-store capabilities.

OAuth-based installation flow

Shopify Billing API integration

Polaris Admin UI development

Webhooks & event handling

App Store submission & approval

Typical timeline: 8–16 weeks

Use Cases

Shopify Apps We’ve Built for Indian D2C Brands

Real-world solutions delivered through Custom Shopify App Development - solving operational, conversion, and automation challenges with deep Shopify API Integration.

🏭

Unicommerce ↔ Shopify Inventory Sync

Real-time sync between Shopify and Unicommerce WMS across multiple warehouses.

Smart order routing by warehouse
Auto-cancellation for COD failures
Eliminated 400+ manual ops/day

Shopify Admin APIUnicommerce APIWebhooksNode.js

🎨

Custom Product Personalisation Builder

Interactive product customisation directly on the storefront.

Text, font & preview on product images
Dynamic line item properties
Auto-sync with order & packing data

Theme ExtensionCanvas APILine Item PropsLiquid

🧾

GST Invoice Auto-Generator

Automated invoice system for Indian compliance.

GST, HSN, tax logic from order data
PDF generation & auto email attach
Reduced manual accounting workload

Shopify Orders APIPDF GenerationGST LogicEmail Attach

📍

Pin Code COD Eligibility Checker

Real-time delivery & COD availability validation.

Pincode-based serviceability check
Shiprocket API integration
Reduced RTO by filtering invalid orders

Theme ExtensionShiprocket APIPin Code DB

📊

D2C Analytics Dashboard

Centralised reporting across multiple Shopify stores.

Revenue, AOV, repeat purchase tracking
Multi-store data aggregation
Real-time updates via webhooks

Shopify Admin AppGraphQL APIRemixPolaris

🎯

Subscription & Replenishment App

Recurring purchase system for consumable products.

Auto-renew subscriptions (30/60/90 days)
Customer self-manages subscriptions
Razorpay recurring payment integration

Shopify APIRazorpay RecurringCustomer Account

Tech Stack

Built on Shopify's Official Stack

As a reliable Shopify App Development Company, we build using Shopify’s official tools and APIs - ensuring long-term stability, performance, and compatibility.

No shortcuts. No outdated methods. Every solution in our Custom Shopify App Development follows Shopify’s latest standards, so your app scales as the platform evolves.

Framework

Shopify CLI (latest version)

Remix (embedded app architecture)

Shopify Polaris UI

App Bridge

APIs (Shopify API Integration)

GraphQL Admin API

REST Admin API

Storefront API

Webhooks

Backend

Node.js / Express

Python / FastAPI

PostgreSQL

Redis (queue & caching)

In India Integrations

Razorpay API

Shiprocket API

Unicommerce API

WhatsApp Business API

How It Works

From Idea to Live Shopify App

Week 1 · Discovery

Requirements & Architecture

We map your exact requirements, APIs, and integrations, then define the right app architecture.

Technical specification document
API mapping & integration plan
Fixed-price proposal

Technical SpecAPI MappingFixed Price

Week 1–2 · Foundation

App Setup & Authentication

AApp is initialised using Shopify CLI with secure authentication and environment setup.

Shopify CLI setup
Auth flow (OAuth for public apps)
Development store & webhook setup

Shopify CLIAuth SetupDev Store

Week 2–4 · Build

Core Feature Development

We build core functionality with real-time visibility and staging access.

Feature development in sprints
API integrations tested on live-like data
Edge cases & India-specific logic handled

Sprint BuildStaging AccessAPI Integration

Final Phase

Testing & Deployment

End-to-end QA and production deployment with monitoring from day one.

QA across real scenarios
Load & performance testing
App deployment & monitoring setup

QA & Load TestApp ReviewProduction DeployMonitoring

Why Cognito IT

Shopify App Development by Experts Who Work Only on Shopify

Unlike generic agencies, we specialise exclusively as a Shopify App Development Company - building scalable solutions that align with Shopify’s ecosystem and evolve with every API update.

🛍️

Shopify-Only Team

Focused expertise across Admin APIs, Storefront APIs, CLI, and Polaris - no distractions across multiple platforms.

🇮🇳

Deep Integration Expertise

Strong experience in Shopify API Integration with Razorpay, Shiprocket, Unicommerce, Delhivery, and WhatsApp - handling real-world edge cases.

📋

Fixed Scope, Clear Pricing

Every Custom Shopify App Development project begins with a detailed technical spec and fixed pricing - no scope creep or hidden costs.

🔒

Built on Shopify Standards

We use Shopify’s latest frameworks (CLI, GraphQL, App Bridge) to ensure your app remains stable, secure, and future-ready.

🛠️ Apps Built for Indian D2C

Razorpay UPI Reconciliation App

Auto-matches Razorpay UPI payments to Shopify orders — resolving the most common COD/prepaid confusion on high-volume stores.

Private App

Multi-Warehouse Order Router

Routes each order to the nearest serviceable warehouse by pin code — cutting average dispatch time from 36hrs to 14hrs.

Private App

Live Delivery ETA Widget

Storefront theme extension showing estimated delivery date by pin code on product pages — reduced "where's my order" support tickets by 40%.

Theme Extension

FAQs

Shopify App Development — Common Questions

A Shopify App Development Company builds custom apps, integrations, and extensions to add functionality that Shopify doesn’t support out of the box.

Custom Shopify App Development involves creating tailored apps for your store to automate workflows, integrate systems, and improve operations or conversions.

Private apps are built for a single store with direct API access, while public apps are listed on the Shopify App Store for multiple merchants.

Private apps typically take 2–6 weeks, theme extensions 2-4 weeks, and public apps 8–16 weeks, depending on complexity.

Yes, using Shopify API Integration, you can connect ERP, WMS, payment gateways, and logistics platforms like Razorpay or Shiprocket.

Apps are built using Shopify CLI, Remix, GraphQL APIs, Node.js/Python backends, and Polaris UI for admin interfaces.

Yes, theme app extensions allow you to add frontend features like widgets, personalisation tools, and dynamic sections without modifying theme code.

Yes, custom apps can automate inventory sync, order routing, invoicing, subscriptions, and customer workflows to reduce manual effort.

Yes, Shopify APIs are secure and scalable when built using official frameworks, ensuring long-term stability and performance.

You should build a custom app when existing apps cannot meet your specific business logic, integrations, or scalability requirements.

Let's Build It

Got a Shopify Problem No App Solves?

Tell us what you need. We'll tell you exactly how to build it, how long it takes, and what it costs — in a free 30-minute call.

Discuss Your App Send a Brief

Shopify App Development India | Custom Apps – Cognito IT

Custom Shopify App Development for Indian D2C Brands

Three Types of Shopify Apps We Build

Shopify Apps We’ve Built for Indian D2C Brands

Built on Shopify's Official Stack

From Idea to Live Shopify App

Shopify App Development by Experts Who Work Only on Shopify

Shopify App Development — Common Questions

Got a Shopify Problem No App Solves?

Your High-Converting Shopify Store,
Built in 2–3 Weeks

Shopify App Development India | Custom Apps – Cognito IT

Custom Shopify App Development for Indian D2C Brands

Three Types of Shopify Apps We Build

Shopify Apps We’ve Built for Indian D2C Brands

Built on Shopify's Official Stack

From Idea to Live Shopify App

Shopify App Development by Experts Who Work Only on Shopify

Shopify App Development — Common Questions

Got a Shopify Problem No App Solves?

Often Built Alongside Custom Apps

Your High-Converting Shopify Store,Built in 2–3 Weeks

Your High-Converting Shopify Store,
Built in 2–3 Weeks