What is Shopify App?

A Shopify App is an application that adds extra features or functionality to a Shopify store.

Think of Shopify as the main platform, and Shopify Apps as plugins/extensions that customize what the store can do.

Examples

A Shopify App could:

• 📦 Automatically manage inventory
• 🚚 Track shipments
• 💳 Add subscription/recurring payments
• 🎨 Customize the storefront
• 📧 Send abandoned-cart emails
• 📊 Provide sales analytics
• 🤖 Add AI-powered product recommendations
• 🛍️ Connect the store to Amazon, eBay, Instagram, etc.

Simple example

Suppose a Shopify store sells clothing.

Shopify already handles things like:

Products → Cart → Checkout → Orders → Customers

You could build an app called "Size Recommendation" that adds a button to product pages:

"What's my size?"

The app could ask the customer for height, weight, and preferred fit, then recommend:

Recommended size: Medium

The app communicates with Shopify through Shopify APIs to access or modify store data.

What does a Shopify App developer build?

Typically, you build:

Shopify Admin / Store → Your App → Shopify APIs → Database / External services

Shopify provides APIs, authentication, webhooks, and app-extension mechanisms so your application can interact with merchants' stores.

There are also different types of Shopify apps, including public apps, custom apps, and app extensions.

If you're learning Shopify app development, the most important concepts to understand first are Shopify Admin, Storefront, GraphQL Admin API, OAuth, webhooks, app extensions, and Shopify CLI.