'Complete Your Routine' add-ons in buy box: +4% revenue per visitor
Test run byBlend CommerceCRO agency
Commentary byLiftArchiveOur analysis, not theirsMoving a 'Complete Your Routine' add-on module into the product-page purchase area lifted revenue per visitor by 4% across all devices for Stone Creek Coffee.
Blend Commerce ran the test over two weeks in Intelligems.
Desktop gained strongly, mobile lost, and the result did not reach statistical significance.
- All devices: revenue per visitor +4%, conversion rate +7%, subscription orders per visitor +111%, average order value -3%.
- Desktop: conversion rate +26%, revenue per visitor +24%, add-to-cart rate +22%.
- Mobile, a negative result: conversion rate -5%, revenue per visitor -9%, average order value -4%.
- None of these reached statistical significance, so treat them as directional. Blend Commerce recommended a desktop-only rollout.
The change
Add-on module moved from low on the page into the purchase panel
Simplified mockup drawn by LiftArchive from the shared screenshots.
Control
A recommendation module sat low on the product page and showed alternative coffees. Scrollmaps showed only 2.41% of mobile visitors reached it.
Variant
A 'Complete Your Routine' module, powered by Rebuy AI, sat inside the right-hand purchase panel and suggested complementary items such as equipment. Quick-add opened the existing option picker.
Why it likely won
Our reading of the result, not the practitioner's claim.
- Showing add-ons where people are already deciding gets them seen. The old module was almost never reached on mobile.
- Complementary items such as gear fit a buyer who has already picked a coffee better than more coffees do.
- On a small screen, an extra module in the buy box may crowd the main choice and slow people down.
- The desktop gain came from more buyers, not bigger baskets, since desktop order value fell slightly.
Caveats: The two-week test did not reach statistical significance, and sample size was not shared. Mobile results were negative, so the overall gain hides a split by device.
Who ran it
Blend Commerce ran this test for Stone Creek Coffee and published the results (Blend Commerce A/B test). The numbers are theirs; the summary and commentary on this page are ours.
Read the original case study on Blend Commerce →
How to run this test on your store
- Hypothesis
- If we show complementary add-ons inside the product-page purchase area, then revenue per visitor will rise because more shoppers see relevant extras before they buy.
- Primary metric
- Revenue per visitor, reported by device
- Guardrails
- Mobile conversion rate
- Average order value
- Main product add-to-cart rate
- Who should test it
- Stores with natural add-ons, such as coffee and brewing gear, and enough desktop traffic to measure. Segment by device from the start. If most of your traffic is mobile, test a lighter version for mobile.
Questions
Where should product recommendations go on a product page?
Stone Creek Coffee saw desktop revenue per visitor rise 24% when add-ons sat in the buy box.
On mobile the same placement lost, so test each device separately.
Should recommendations show similar or complementary products?
This test switched to complementary items alongside the move.
Because both changed at once, the source cannot say which part drove the result.
Is a result without statistical significance useful?
It can point you in a direction, but it can also be noise.
Here, a desktop-only rollout was recommended, which is a sensible next test rather than a proven win.
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