If your ADU (Automatic Discounts & Upsells) discount isn't showing in the cart or at checkout, work through the steps below in order. Each step is a distinct cause — once you've confirmed a step and it didn't fix the issue, move on. Do not repeat a step.
⚡ Campaign running right now? Start at Step 1 and move quickly — each step takes under 2 minutes to check.
Step 1: Check that the theme extension embed is enabled
The app requires a theme extension embed to apply discounts on your storefront. If this isn't enabled, discounts won't appear anywhere — not in the cart drawer, cart page, or checkout.
How to check:
Open the app in Shopify Admin → Apps.
On the app home page, look for a banner about Theme extension integration.
If the banner is present, click it and follow the prompt to install the App Embed in your theme.
Save your theme and test the cart again.
If the embed is already enabled and the discount still isn't showing, continue to Step 2.
Step 2: Test whether a cart page refresh shows the discount
Some Shopify themes don't automatically re-render the cart when a discount is applied in the background. The discount may already be active — it just isn't visible until the cart refreshes.
How to test:
Add an eligible product to the cart.
Manually refresh the cart page (or navigate away and back).
Check whether the discount label or updated price now appears.
✅ If the discount appears after refreshing: This is a theme rendering limitation, not an app bug. The discount is working correctly. Consider adding a note on your cart page advising customers to refresh if the discount doesn't appear immediately, or contact your theme developer about enabling automatic cart re-rendering.
❌ If the discount does not appear even after refreshing: This is not a cart refresh issue. Continue to Step 3.
Step 3: Check for express checkout buttons (PayPal, Apple Pay, Google Pay, Shop Pay)
Express checkout buttons bypass the cart page entirely and send customers straight to a separate checkout flow. Our app applies the discount during the standard cart-to-checkout flow — so if a customer clicks an express button from the product page or cart, the discount logic never runs.
How to check:
Test the exact flow your customers use: add a product to cart, go to the cart page, and click the standard Shopify checkout button (not PayPal, Apple Pay, Google Pay, or Shop Pay).
Check whether the discount appears at checkout using this flow.
✅ If the discount appears when using the standard checkout button: Express checkout buttons are the cause. The fix is to hide express buttons on the product page and cart page, keeping them available only on the checkout page (where the discount will already be applied).
❌ If the discount still doesn't appear even through the standard checkout button: Continue to Step 4.
Step 4: Check for conflicting apps
Some third-party apps that modify cart or checkout behaviour can conflict with our discount logic. The most common culprits are:
Checkout X or other custom checkout apps (not compatible — will block discounts from applying)
Rebuy (can interfere with cart and checkout discount display)
Apps that replace the default Shopify checkout button with a custom script or link
How to check: Temporarily disable any apps that modify your cart or checkout, then test the discount again with the standard checkout flow.
✅ If the discount appears after disabling an app: That app is the conflict. You'll need to choose between using that app and our discount feature, or contact us so we can advise on a compatible setup.
❌ If the discount still doesn't appear after disabling conflicting apps: Continue to Step 5.
Step 5 (Custom Deal codes only): Check where the code is being entered
This step only applies if you are using a Custom Deal promo code.
⚠️ Custom Deal codes do not work if entered at Shopify checkout. They must be entered through the app's floating discount widget on the product or cart page — before the customer clicks checkout.
The floating widget icon is usually at the bottom-centre or bottom-right of the screen. The customer clicks it, enters the code, and the discount is applied before they proceed to checkout.
If customers are entering the code in Shopify's checkout discount box instead, it will not apply. This is a Shopify platform limitation — Custom Deal codes are app-managed and not processed by Shopify's native discount system.
If you're using an automatic discount (no code required), this step does not apply — continue to Step 6.
Step 6: Contact support
If you've worked through Steps 1–5 and the discount still isn't displaying, this is likely a theme compatibility issue that needs investigation by our team.
When you contact us, please share:
Which steps you've already completed and what you observed at each one
Your Shopify theme name and version
A link to a product page where the discount should be visible
A screenshot or screen recording of the cart after adding an eligible product
This helps our team diagnose the issue quickly without repeating steps you've already tried.