Cart Bump help
Cart Bump · Checked against the app on 9 October 2026
Cart Bump puts a one-tap add-on offer on your cart page: "Add gift wrap?", "Add a spare charger?", "Add shipping protection?". Shoppers tap Add to order and the item joins their cart without leaving the page. The offer hides itself once that product is in the cart.
Everything runs inside your theme as a block on the cart page. There is no dashboard to learn.
Setup (about three minutes)
- Install Cart Bump from the Shopify App Store. You land on a short welcome page.
- Click Open theme editor. It opens your Cart page with the Cart Bump block ready to add. (Or go to Online Store > Themes, click Customize or Edit theme, whichever your admin shows, switch the page selector at the top to Cart, click Add block (or Add section) > Apps > Cart Bump.)
- Under Bump products, choose the product to offer.
- Write your Offer title under Bump 1, for example "Add gift wrap for $4?".
- Drag the block to where you want it (just above the checkout button works well) and click Save.
To preview it, add any product to your cart first. Cart Bump never shows on an empty cart, because there is no order to add to. In the editor an empty cart shows a short reminder instead.
Plans
| Free | Pro | |
|---|---|---|
| Offers on the cart page | 1 (Bump 1) | Up to 3 (Bump 1, 2, 3) |
| Styling (colours, layout, corner radius, text) | Yes | Yes |
| Hide when already in cart | Yes | Yes |
| Rules: cart contains / does not contain a product | No | Yes |
| Rules: minimum and maximum cart total | No | Yes |
| Start and end dates | No | Yes |
| Price | Free | See the App Store listing (14-day free trial) |
To change plan, open Apps > Cart Bump in your Shopify admin and click Choose or change plan. Shopify handles the billing; you never need to contact us or reinstall. After an upgrade, the theme editor confirms Pro under your offer straight away. Your storefront can take up to a few hours to follow, because Shopify caches app data.
Settings marked with a lock (🔒) only take effect on Pro. On Free they are ignored, so filling them in does no harm.
Settings
Bump products
Pick up to three products. The first is Bump 1, the second Bump 2 (Pro), the third Bump 3 (Pro). If a product has several variants, Cart Bump offers its first available variant. To offer a specific variant (for example a size), make it the first variant on that product, or create a separate add-on product.
An offer is skipped automatically when:
- the cart is empty,
- the product (or every variant) is sold out or unavailable,
- the product is already in the cart.
Display
| Setting | Default | What it does |
|---|---|---|
| Heading | Before you check out | Text above your offers. Leave blank for no heading. |
| Layout | Card | Card is a bordered card with a larger image. Row is a compact line with a small image and a divider instead of a border, which suits narrow carts. Both stack on phones. |
| Button text | Add to order | Text on the add button. |
| Button text after adding | Added | Shown briefly after a successful add. |
| Show product image | On | Shows the product's featured image. |
| Show compare-at price | On | Shows the struck-through compare-at price when the variant has one that is higher than its price. |
| Button color | #111111 | Add button background. |
| Background color | #ffffff | Offer card background. |
| Text color | #111111 | Offer text colour. |
| Corner radius | 8px | 0 for square corners, up to 24px. |
| After adding | Refresh the cart | Refresh the cart updates the items, subtotal and cart count in place. Reload the page reloads the cart page; choose it if your theme does not update after adding. |
The price always shows on the offer, so shoppers know what they are adding before they tap.
Per offer (Bump 1, Bump 2, Bump 3)
| Setting | Plan | What it does |
|---|---|---|
| Offer title | All | The headline, for example "Protect your order for $2.99". Defaults to "Add this to your order?". |
| Offer description | All | One short line under the title. Optional. |
| Badge | All | A small label such as "Popular add-on" or "Last chance". Optional. |
| Show when the cart | Pro | Always, Contains the rule product, or Does not contain the rule product. |
| Rule product handle | Pro | The product the rule checks, as its handle: the last part of its URL. For yourstore.com/products/gift-wrap the handle is gift-wrap. Pasting the whole product URL also works, as long as it has nothing after the handle (no ?variant=...). |
| Minimum cart total | Pro | Only show when the cart total is at least this much. 0 means no minimum. |
| Maximum cart total | Pro | Only show when the cart total is at most this much. 0 means no maximum. |
| Start date | Pro | First day the offer shows, as YYYY-MM-DD, in your store's timezone. |
| End date | Pro | Last day the offer shows (inclusive), as YYYY-MM-DD. |
Cart totals are compared in the currency the shopper is paying in. If you sell in several currencies, set totals that make sense in each, or leave them at 0.
Pro rules, worked examples
Offer a case only to people buying the phone: Bump 1 product: Phone case. Show when the cart: Contains the rule product. Rule product handle: phone-x.
Offer shipping protection on bigger orders only: Bump 2 product: Shipping protection. Minimum cart total: 50.
Push a cheap add-on to small carts, a premium one to big carts: Bump 1 with Maximum cart total 40, Bump 2 with Minimum cart total 40.
Holiday gift wrap: Bump 3 product: Gift wrap. Start date 2026-11-20, End date 2026-12-24.
Do not offer the refill to people who already bought the starter kit in this cart: Show when the cart: Does not contain the rule product. Rule product handle: starter-kit.
What makes a good bump offer
- Cheap compared with the cart. Add-ons that cost a small share of the order get added most: gift wrap, protection, refills, a sample size, batteries, a care kit.
- Obviously related. The offer should make sense next to what is already in the cart.
- Clear price in the title. "Add gift wrap for $4" beats "Make it special".
- One line of why. Use the description: "Arrives wrapped with a handwritten card."
- A real discount, if you show one. Compare-at prices are displayed as set on the product. For a true price cut at checkout, pair the offer with an automatic discount under Discounts.
FAQ
Does Cart Bump show in the slide-out cart drawer?
No. Cart Bump is a block for the cart page. If your theme opens a drawer, shoppers usually reach the cart page through its View cart link. If you want every shopper to see the offer, many themes let you change the cart type to Page under Theme settings > Cart.
Does it show at checkout?
No. Checkout is run by Shopify, outside your theme. Cart Bump works on the cart page, the last step before checkout.
Does it change prices or apply discounts?
No. Cart Bump adds the product at its normal price. To discount the add-on, create an automatic discount in Shopify for that product.
Does it work with subscription or bundle products?
Cart Bump adds the variant as a one-time purchase. Products that can only be bought on a subscription will not add.
Which themes are supported?
Online Store 2.0 themes, which includes Dawn and every theme in the Shopify Theme Store today. The cart page must use a JSON template (all 2.0 themes do). Older vintage themes cannot take app blocks.
Does it slow my store down?
Cart Bump only loads on the cart page, and only when an offer is showing. It adds one small stylesheet and one small script from Shopify's servers. The storefront makes no calls to our server.
What data does Cart Bump collect?
None about shoppers. Adding an offer is a normal add to cart handled by Shopify. Privacy policy: https://digitalcartel.online/privacy/cart-bump.html
Can I see how many bumps were added?
Bumped items are ordinary line items, so they show in your Shopify orders and sales reports. In Analytics > Reports, filter sales by the add-on product. Items added through an offer also carry a hidden line item property, _cart_bump, on the order, which tells them apart from the same product added the normal way.
Troubleshooting
I added the block but see nothing.
- Add a product to your cart. Cart Bump never shows on an empty cart.
- Check the bump product is not already in the cart, and is in stock. In the editor a hidden offer shows the same "Pick a product for Bump 1" reminder as an empty one, so check this even if you have picked a product.
- Check you are previewing the Cart page template.
- On Free, only Bump 1 shows. Bumps 2 and 3 need Pro.
- On Pro, check the rules: a start date in the future, an end date in the past, or a cart total outside your min and max will hide the offer.
I can't find Cart Bump under Add block.
Switch the theme editor to the Cart page first; the block is only offered there. If you still do not see it, your theme may be a vintage theme without app block support.
I tap Add to order and the cart does not update.
Set After adding to Reload the page and save. Some themes build their cart page in a way Cart Bump cannot refresh in place; a reload always shows the right cart.
A message under the offer says "Could not add this item. Please try again."
Shopify refused the add, usually because the product sold out a moment ago, has a purchase limit, or is not available in the shopper's market. Check the product's inventory and its availability under Markets.
My Pro rules are ignored.
Check your plan under Apps > Cart Bump. A plan change can take up to a few hours to reach the storefront. Check the rule product handle matches the product URL exactly (a rule with an empty handle is skipped, so the offer always shows), and dates use the YYYY-MM-DD format (for example 2026-11-20). Anything else in a date box is ignored.
The offer looks out of place in my theme.
Try Layout: Row, match Button color to your theme's button, and set Corner radius to match your theme's buttons (0 for square themes).
Uninstalling
- Go to Settings > Apps and sales channels, find Cart Bump and click Uninstall.
- The block disappears from your cart page. Cart Bump never edits your theme files, so nothing is left behind.
- Uninstalling cancels a Pro subscription automatically. Shopify handles any proration.
Products that were added through Cart Bump stay on past orders as normal line items.
Still stuck?
Email support@digitalcartel.online with your store address, your theme name and a screenshot of your cart page. A real person (the developer) reads every message.