BundleStack

Quantity breaks and volume discounts that grow order value. Shoppers see Buy 2 save 10% or Buy 3 save 15% on the product page, then the discount applies at checkout.Create an offer, pick products, set quantity tiers, and activate. BundleStack syncs Shopify discounts automatically, includes a product-page widget, a product picker with no manual IDs, store health checks, and a clean uninstall. Unlimited offers. Free to install.