Addy 
Addly 
Goalify 
Monet 
Reviso 
Key takeaways
- If the bundle is the product, it belongs in the buy box — a selector, not a widget under the description.
- If the bundle is an optional upgrade to a single SKU, it belongs immediately under add-to-cart, still above the fold on desktop.
- Footer carousels and "you may also like" rows are for discovery, not for this purchase. They convert like related products, because they are related products.
- Never show the same bundle in two places on one page. The second sighting feels like an ad.
Placement is not decoration. A bundle the shopper does not see is a bundle you did not offer.
Most Shopify product pages bury the offer in a related-products row that starts after the description, the size guide and two app blocks. That row converts like a related-products row. Which is to say: barely, and mostly on sessions that were going to browse anyway.
Three jobs, three places
The bundle is the product. The shopper landed here to buy a set. The buy box is a bundle selector: choose the kit, choose the size, add to cart. A single-item option can exist as a secondary link, not as the default.
The bundle is an upgrade. The shopper landed on a single SKU. Under the add-to-cart button, one block: "Make it a set — save 12%." Still on the first screen on desktop. Still before reviews on mobile.
The bundle is discovery. Someone might want a different kit entirely. That belongs in a collection or a "complete the look" after the decision is made — never as the only offer.
What above the fold actually means
On a 1440px desktop, the buy box and the first 200px under it. On a phone, whatever is visible before the first scroll. If your bundle widget is in a tab labelled "Bundles" next to "Reviews" and "Shipping", you have hidden it.
Apps that inject a block "somewhere in the product template" often land in the somewhere. Open the theme editor and put the block where the job is.
Do not double-place
Showing the same kit in the buy box and again in a carousel under the description does not increase take rate. It increases banner blindness. Pick the slot that matches the job. Delete the other.
After they add
The cart can offer a different completion — a complementary SKU, a quantity break, a free-shipping nudge. It should not repeat the kit they just declined or just accepted. Repeating it is how offers start to feel like pop-ups that never close.
Frequently asked questions
Should a bundle have its own product page?
If it is a kit you want to advertise, yes. The product page of a component can still offer the kit as an upgrade, but the kit needs a URL if you want it in ads, search and collections.
Does a bundle selector hurt single-item conversion?
It can, if it replaces the simple add-to-cart. Keep "Buy this item" as the default and "Make it a set" as the second action, not the other way around — unless the set is genuinely the product.
What about mobile?
On mobile, "above the fold" is one screen. Put the offer in the buy box or the first block under it. Anything that requires a scroll past reviews will not be seen before add-to-cart.
Can I put bundles in the cart instead?
Yes, as a second chance. Do not rely on the cart as the first chance. Most shoppers who wanted the kit would have taken it on the product page if they had seen it.
