Best free Inventory Shopify apps in 2026 [Updated]

The Best Free Shopify inventory apps help merchants master their stock management without adding costs. From real-time inventory syncing across multiple sales channels to barcode scanning, order routing, and automated tracking updates - these essential tools keep your products, quantities, and fulfillment organized. Whether you need multi-store inventory sync, purchase order management, or back-in-stock notifications, these free solutions integrate seamlessly with platforms like PayPal, Clover POS, Walmart, and Etsy to streamline your inventory operations.