Quick-add icon on mobile product cards: -5.6% conversion, mixed
Test run byClean CommitCRO agency
Commentary byLiftArchiveOur analysis, not theirsAdding a one-tap quick-add cart icon to mobile product cards lowered conversion rate by 5.6%, though average order value rose 7.2% and revenue per visitor rose 2.9%.
Clean Commit ran this test for an anonymized Shopify store and published it in its A/B test library.
The result is mixed and not significant: fewer shoppers bought, but they spent more.
- Conversion rate: -5.6%, a negative result. The original had a 79.3% probability of doing better, short of significance.
- Add-to-cart rate: -2.4%, a negative result, even though more adds were the goal.
- Orders: -5.0%, a negative result.
- Revenue per visitor: +2.9%, held up by average order value rising 7.2%.
The change
Mobile product cards gain a one-tap quick-add cart icon.
Simplified mockup drawn by LiftArchive from the shared screenshots.
Control
Mobile product cards with no add button, so shoppers had to open the product page to add an item.
Variant
A floating cart icon on each mobile product card that added the default variant in one tap, and asked for a size when one was needed.
Why it likely came out this way
Our reading of the result, not the practitioner's claim.
- Skipping the product page means shoppers miss photos, reviews and details that help them commit.
- Shoppers who quick-add several items may build bigger baskets, which fits the higher order value.
- A size prompt on a small card can feel like an extra step, which may cancel out the shortcut.
Caveats: Mixed and not significant: fewer buyers but larger orders. Sample size and duration were not shared.
Who ran it
Clean Commit ran this test for a Shopify store (anonymized) and published the results (Clean Commit A/B test library). The numbers are theirs; the summary and commentary on this page are ours.
Read the original case study on Clean Commit →
How to run this test on your store
- Hypothesis
- If we add a one-tap add-to-cart button to mobile product cards, then add-to-cart rate will rise because shoppers won't have to open each product page first.
- Primary metric
- Conversion rate on mobile
- Guardrails
- Average order value
- Revenue per visitor
- Add-to-cart rate
- Who should test it
- Stores selling repeat-purchase or low-consideration items, where shoppers already know the product. Stores with products that need photos, sizing or reviews to sell may see conversion drop, as here.
Questions
Do quick-add buttons increase sales on collection pages?
Not in this test. Conversion fell 5.6% and add-to-cart rate fell 2.4%, though shoppers who bought spent 7.2% more.
How should quick add handle sizes?
This version added the default variant in one tap and asked for a size only when needed.
Even so, the shortcut did not lead to more adds.
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