Talk to a humanOn mobile product pages, the sticky add-to-cart bar moved from the bottom of the screen to the top, replacing the header. Here's what happened across 23,114 visitors.
Moving the Mobile Sticky Add-to-Cart Bar to the Top Shows a 16.4% Conversion Rate Lift
Goal
Conversion rate
Result
+16.4% Conversion rate
Category
Product Page (PDP)
Outcome
Positive signal
Before
After
If we move the sticky add-to-cart bar to the top of mobile product pages, then conversion rate will increase because shoppers can reach the button while seeing more of the product.
What We Changed
- Moved the sticky add-to-cart bar from the bottom of mobile product pages to the top.
- Let the bar replace the top bar and navigation while it's visible.
- Cleared the bottom of the screen so more product content is visible.
The Results
How the new version compared with the original, across all devices.
+16.4%
Conversion rate
+13.2%
Revenue per visitor
+14.0%
Orders
Key Learnings
- Conversion rate rose 16.4% and revenue per visitor 13.2%, with a 98.4% probability that the variant beats the original.
- The test ran 14 days on mobile only and didn't reach statistical significance, so treat this as a strong signal, not proof.
- Bounce rate fell 6.6%, in line with a less cluttered screen.
- Average order value dipped 2.7%, so the gain came from more orders, not bigger ones.
Detailed results breakdown
Conversion rate
+16.4%
Revenue per visitor
+13.2%
Orders
+14.0%
Add-to-cart rate
+5.1%
Average order value
-2.7%
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Other experiments we've run
Product Page (PDP)
Positive signal
Updated Product Page Design on Desktop
The desktop product page was redesigned to improve navigation and engagement. See how the updated design lifted conversion rate by 8.5% and RPV by 17.6%.
+8.5% Conversion Rate
Cart
Inconclusive
A Free Shipping Progress Message in the Mini Cart Shows Mixed Results on Conversion and Revenue
The mini cart started showing how close shoppers were to free shipping, right above the checkout button. Fewer shoppers converted, but those who did placed bigger orders.
-5.9% Conversion rate
Collection Page (PLP)
Inconclusive
Sale Percentage on Product Cards Makes No Clear Difference to Conversion Rate
Sale items showed their percentage price reduction inline on product cards. See what changed across 8,260 visitors in 19 days.
+1.0% Conversion rate