Persistent mobile trust bar and new trust copy: +$42,840/month
Test run byOliver KenyonConversionwise
Commentary byLiftArchiveOur analysis, not theirsRewriting trust messages and adding a persistent trust bar on mobile added an estimated $42,840 in monthly revenue. Oliver Kenyon ran this test on a supplement store. Mobile shoppers had seen no trust messages before.
- About +$42,840 per month in revenue, labelled as a forecast.
- About $514,080 per year, also a forecast based on the monthly figure.
- Conversion rate (the main goal) and revenue per visitor both rose, but exact percentages were not shared.
The change
A slim rotating trust bar is added under the mobile header.
Simplified mockup drawn by LiftArchive from the shared screenshots.
Control
On desktop, trust messages did not speak to buyers' main worries about safety and results. On mobile, there were no trust messages at all: the page went straight from the header to the hero image.
Variant
Trust copy was rewritten around safety, quality and credibility. A slim bar under the mobile header rotated these points, such as "Lab Tested", and stayed visible.
Why it likely won
Our reading of the result, not the practitioner's claim.
- supplement buyers often worry about safety and whether the product works, so claims like lab testing answer a real doubt.
- mobile shoppers had no reassurance at all, so adding any visible trust signal filled a clear gap.
- keeping the bar small let it support the page without pulling focus from the products.
Caveats: Copy rewrites and the new mobile bar were tested together, across desktop and mobile, so their separate effects are unknown. Sample size, test length and percentage lifts were not shared.
Who ran it
Oliver Kenyon (@oliverkenyon) shared this test on X. The numbers and screenshots are theirs.
View the original post on X
How to run this test on your store
- Hypothesis
- If we show a persistent trust bar on mobile with copy that answers buyers' main worries, then conversion rate will rise because shoppers feel safer committing.
- Primary metric
- Conversion rate
- Guardrails
- Revenue per visitor
- Average order value
- Click-through to product pages
- Who should test it
- Stores in categories where safety or quality is a big worry, such as supplements, skincare or baby products, and where mobile shows little reassurance. It matters less for well-known brands or low-risk impulse buys.
Questions
Where should trust badges go on mobile?
In this test a slim, always-visible bar sat just under the header and rotated trust claims. It was part of a change worth an estimated $42,840 a month.
What should trust messages say?
Oliver Kenyon rewrote them to answer real buyer worries about safety, quality and credibility, rather than generic claims.
Can a trust bar distract from products?
It can, which is why this one was kept subtle. Watch product page click-through as a guardrail.
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