Sticky mobile CTA on a subscription homepage: +20.4% conversion
Test run byConvertiblesCRO agency
Commentary byLiftArchiveOur analysis, not theirsAdding a sticky bottom CTA bar to a long mobile homepage lifted conversion rate from 1.135% to 1.366%, a 20.4% gain.
Convertibles ran this A/B test in Intelligems for an Australian whisky subscription brand.
Order value stayed flat, so the extra revenue came from more people joining.
- Conversion rate: 1.135% to 1.366% (+20.4%), with a 95.1% probability to beat control.
- Revenue per visitor: A$1.76 to A$2.10 (+19.6%), but only an 87.3% probability to beat control, so treat it as less certain.
- Average order value: flat (A$155.01 vs A$153.96). The sticky bar brought more orders, not bigger ones.
- Profit per visitor: A$0.63 to A$0.74 (+16.4%). The agency estimated about A$7,632 more revenue a month.
The change
A sticky bottom Join bar with reassurance notes follows the visitor down the page.
Simplified mockup drawn by LiftArchive from the shared screenshots.
Control
A long mobile homepage with Join buttons only inside the page content. Once visitors scrolled past one, they had to scroll back or find the next.
Variant
A sticky bar at the bottom of the mobile screen with a Join now button and two short notes: free shipping, and skip or cancel anytime.
Why it likely won
Our reading of the result, not the practitioner's claim.
- A subscription needs explaining, so many visitors decide well below the first button.
- Keeping the button in reach removes the need to scroll back up once they're ready.
- Free shipping and skip-or-cancel notes address cost and lock-in worries right at the click.
- The offer itself didn't change, which fits the flat order value.
Caveats: The test ran from 2 April to 7 May 2026 with 25,935 visitors and 327 orders. The revenue gain is less certain than the conversion gain, and revenue figures are in Australian dollars.
Who ran it
Convertibles ran this test for an Australian whisky subscription brand and published the results (Convertibles case study). The numbers are theirs; the summary and commentary on this page are ours.
Read the original case study on Convertibles →
How to run this test on your store
- Hypothesis
- If we add a sticky CTA bar with short reassurance notes to a long mobile homepage, then more visitors will subscribe because the button is in reach when they decide.
- Primary metric
- Conversion rate
- Guardrails
- Revenue per visitor
- Average order value
- Subscription cancellation rate
- Who should test it
- Subscription and premium brands with long mobile pages that explain the offer. Short pages, or pages with a visible button at every decision point, will likely see little gain.
Questions
Do sticky CTAs increase conversions?
They can on long pages where people decide after the first button scrolls away.
Here a sticky bar lifted conversion 20.4% on mobile.
What should a sticky CTA bar include?
The button plus the smallest bit of reassurance that answers the main worry.
For this subscription, that was free shipping and skip or cancel anytime.
When does a sticky CTA hurt?
When it covers content, feels pushy, or repeats a button that is already visible. Short pages rarely need one.
Similar tests
@oliverkenyon
@DaveDiederenConvertibles
Blend CommerceBlend CommerceBlend Commerce