SHOPIFY APP · NATIVE FUNCTIONS
Lift cart volume with native tiered discounts.
CartLift helps Shopify merchants create high-converting quantity break offers and tiered volume pricing. Powered by Shopify Functions (WebAssembly), it calculates discounts directly inside Shopify’s checkout engine in under 5 milliseconds with zero external cloud latency.
Built for Online Store 2.0 themes. No theme code edits or draft order hacks.
THREE PILLARS OF PERFORMANCE
Engineered for modern commerce.
Fast for buyers.
Effortless for merchants.
Native WebAssembly.
Built with Shopify Functions. Your discount logic compiles to Wasm and executes on Shopify’s global servers during checkout in <5ms. No external servers to crash during Black Friday sales.
Interactive Tier Table.
A customizable Theme App Block that displays volume tiers right on the product page. Customers click a tier, the theme quantity synchronizes instantly, and the discount appears automatically at checkout.
Visual Tier Builder.
A clean Polaris admin with a real-time live preview. Set up percentage or fixed-dollar tiers, customize badges ("Popular", "Best Value"), and save rules directly to Shopify Metafields.
THE DETAILS
Built right for Shopify 2.0.
Click & update.
When shoppers click any tier in the table, the native product form quantity selector updates in real time without refreshing.
Live unit costs.
The tier table automatically recomputes discounted unit prices whenever shoppers switch product variants or currencies.
Matches your store.
Customize accent colors, background tint, card borders, and highlight badges directly inside the Shopify Theme Customizer.
Shopify native rules.
Works seamlessly with Shopify’s discount combinations, order discounts, and free shipping promotions.
No leftover code.
Because it uses Theme App Extensions, uninstalling leaves zero orphaned Liquid scripts or theme junk behind.
GDPR compliance.
Full support for mandatory Shopify GDPR webhooks. No tracking of personal shopper details.
SET UP IN MINUTES
Install.
Set tiers.
Lift cart size.
- Install CartLift from the Shopify App Store and launch it in Shopify Admin.
- Configure your tiers in the Tier Builder: choose quantity thresholds (e.g. 2, 3, 5) and discount values (e.g. 10%, 15%, 20%).
- Click Save & Activate to register the automatic discount with Shopify Functions.
- Open Theme Customizer (Online Store → Themes → Customize), add the Volume Discount Table block to your product page, and publish.
CONFIDENCE & COMPLIANCE
Transparent and secure.
CartLift: Volume Discounts does not require third-party server hosting or cloud databases. All calculations happen inside Shopify’s infrastructure.
Common questions
How does CartLift differ from legacy discount apps?
Legacy apps use draft orders or external cloud webhooks, which slow down checkout and often conflict with currency converters or payment gateways. CartLift uses Shopify Functions (Wasm), executing natively inside Shopify checkout in under 5ms.
Does it work with Shop Pay and PayPal?
Yes! Because the discount is handled as a native Shopify Automatic App Discount, accelerated checkouts like Shop Pay, PayPal, Apple Pay, and Google Pay receive the discount instantly.
Will it slow down my storefront?
No. The storefront asset is a lightweight CSS file and a deferred <3KB script that attaches to existing theme events without blocking render.
What happens if I uninstall the app?
The app uninstalled webhook removes the discount function registration, and removing the app block cleanly leaves your theme code 100% untouched.