# Sticky filter and sort bar on mobile: inconclusive on sales

- Outcome: Flat / inconclusive
- Page type: Collection page (Ecommerce)
- Elements: Filters, sorting & site search
- Test run by: [Blend Commerce](https://liftarchive.com/practitioners/blend-commerce/)
- Commentary by: LiftArchive (our analysis, not theirs)
- Original source: https://blendcommerce.com/blogs/ab-tests-shopify/improve-mobile-filter-engagement-sticky-controls
- Page: https://liftarchive.com/test/little-bible-stories-sticky-mobile-filters/

Making the filter and sort bar sticky on mobile collection pages raised filter and sort clicks by 299.58% for Little Bible Stories, but did not lift sales. Blend Commerce ran this A/B test in Intelligems. Conversion rate and revenue per visitor dipped slightly, and neither change was significant, so we treat this as inconclusive.

## Result

**inconclusive on sales**

- Filter and sort clicks: +299.58%, so shoppers used the controls far more.
- Conversion rate: -2.23%, not significant.
- Revenue per visitor: -1.80%, not significant. Average order value was flat.
- Returning visitors did slightly better, with 2% more product page views and small gains in revenue per visitor.
- Blend Commerce shipped it as a UX improvement, not a revenue win.

## Control

Filter and sort controls sat at the top of mobile collection pages and scrolled out of view.

## Variant

A sticky filter and sort bar stayed on screen as shoppers scrolled down the collection page on mobile.

## Why it likely came out this way (our reading)

- More filtering does not mean more buying. Easier access changed how shoppers browsed, not whether they bought.
- New visitors may not know the range well enough to use filters well, which could explain their small declines.
- Returning visitors know what they want, so quick filtering helped them a little more.

## Caveats

Mobile only. The sales changes were not statistically significant, and sample size and duration were not shared.

## How to run this test

- Hypothesis: If we keep filter and sort controls sticky on mobile collection pages, then conversion will rise because shoppers can narrow the range without scrolling back up.
- Primary metric: Conversion rate
- Guardrail: Revenue per visitor
- Guardrail: Product page view rate
- Guardrail: Results split by new and returning visitors
- Who should test it: Stores with long mobile collection pages and many products to narrow down. Don't expect a sales lift from filter clicks alone; it may only help repeat shoppers.

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Credit: Blend Commerce ran this test and owns the result. Summary and commentary by LiftArchive (https://liftarchive.com/test/little-bible-stories-sticky-mobile-filters/).
Usage: Free to use, quote and build on, with credit and a link: name the practitioner or organization that ran the test and link to its LiftArchive page. The results belong to the practitioners who ran and shared them; the summaries and commentary are LiftArchive's.