# Deep Dive: What is the difference between Public, Custom, and Private Shopify apps? (Part 4) | Expert Answer & Guide

> Public apps are published on the Shopify App Store for multi-tenant use, Custom apps are created for a specific store and embedded in Admin, while Pri... Read the detailed technical breakdown and recommendations.

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Deep Dive: What is the difference between Public, Custom, and Private Shopify apps? (Part 4) | Expert Answer & Guide

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Deep Dive: What is the difference between Public, Custom, and Private Shopify apps? (Part 4)

Public apps are published on the Shopify App Store for multi-tenant use, Custom apps are created for a specific store and embedded in Admin, while Private/Custom app integrations use API keys and webhooks for proprietary ERP/CRM backend syncing.

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In-Depth Engineering Explanation

Most scaling D2C brands use Custom Shopify Apps built with Remix or Node.js to implement proprietary business logic, automated warehouse synchronization, and custom checkout flows without paying ongoing SaaS subscriptions for generic public apps.

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