Shopify A/B testing
Shopify A/B testing, built by CRO specialists. At a price that does not need a board meeting.
Run tests in your Shopify theme, judge them on revenue per visitor, and read the result in plain English. Starting free. Pro CRO from $49 a month.
Shopify A/B testing in your theme, from $0, with Pro CRO from $49 a month.
The problem
Most testing tools report the wrong number, or hide how sure they are.
A conversion lift that hurts revenue is not a win. We built our testing app to track revenue per visitor, show lift ranges, and say when a result is only directional.
How we work
Built for what happens after the click.
Most brands don't need more traffic. They need the traffic they already pay for to convert.
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After the click
Once the ad is working, the levers left are after the click: the presell, the product page, the offer and the checkout.
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People-managed CRO
One team. No handovers. The people who plan the work build it, on the CRO & Scale Plan.
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Driven by the data
Research is stored in the brand's CRO Brain. Builds are supported by PMD Cortex AI and checked by an engineer.
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A programme, not one lucky win
Winners roll out sitewide, from product page to checkout. The result goes back into research, so the next test starts smarter.
How we work
A four-step setup, then a clear read.
The app has a redesigned dashboard and a four-step guided setup. Geni AI can answer questions about your results.
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01
Research
We start with the customer: reviews, support tickets, ads and store data, then store what we learn in the brand's CRO Brain.
PMD Cortex AI · CRO Brain -
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Plan the tests
The roadmap is built around revenue per visitor and the offer, not vanity conversion rate alone.
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03
Design and build
Pages and tests are designed, built in your theme and checked by an engineer. PMD Cortex AI supports the work. The team stays responsible for delivery.
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Test and read
Tests run in your theme. We read revenue per visitor first, and we say when a result is only directional.
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Roll out and learn
Winners go sitewide, and the result goes back into the CRO Brain so the next test starts smarter.
PMD Cortex AI · CRO Brain
Shopify A/B testing
What you can test today.
You can run page tests and price tests, with price tests charged at the real checkout price. Checkout block testing, including upsells, images, text, trust badges and callouts, sits on the Plus CRO plan.
On a Shopify store, a 50/50 cart drawer test ran in autumn 2026. Revenue per visitor rose 16%, from $2.01 to $2.33. Conversion rate rose 9%, from 1.49% to 1.63%, and average order value rose 5%. The app's own insight called this a directional read, not a definitive verdict, and recommended shipping the variant and measuring it again.
The store name has been removed. This is an app test example, not a PM Digital client case study.
Starting free. Pro CRO from $49 a month.
- Free Testing$0. One page test, one price test and one content edit test.
- Pro CRO$49 a month, with a 2-day free trial. Unlimited tests.
- Plus CRO$99 a month, with a 2-day free trial. Adds checkout block testing: upsells, images, text, trust badges and callouts.
Who we help
Built for founders, marketers and agencies in the US and the UK.
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Founders and marketers
People who want serious Shopify A/B testing without a tool that needs a board meeting.
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Agencies
Teams that need a testing layer they can run for clients, then read in plain English.
The founder and the team
Paddy McLarnon, founder, and the team that does the work.
Paddy McLarnon founded PM Digital and has been a name in CRO for the last four years. He takes the first call with every brand himself, and stays close to the strategy. He has spoken at DTC Growth Summit in Miami and New York, and hosts the Funnel First podcast.
Meet the agency
Our team
The in-house team behind the work.
Your pod does the work, and the whole team backs it. Plus you, in a dedicated Slack channel with all of them.
FAQs
Frequently asked questions
What is Shopify A/B testing?
It is a controlled comparison of two versions of a page, price or checkout block, judged on the revenue the store actually earns. We built a Shopify testing app for that work, and we also run tests as part of the CRO and Scale Plan.
How much does the app cost?
There is a free plan, with one page test, one price test and one content edit test. Pro CRO is $49 a month with unlimited tests and a 2-day free trial. Plus CRO is $99 a month and adds checkout block testing.
Can it test prices at checkout?
Yes. Price tests use Shopify's Cart Transform, so customers pay the price being tested.
Do ordinary tests need the Plus CRO plan?
No. Ordinary tests sit on Free Testing or Pro CRO. Checkout block testing, including upsells, images, text, trust badges and callouts, sits on Plus CRO.
How should I read a directional result?
A directional result is a useful signal, not a closed case. The cart drawer example on this page was read that way: ship the variant and measure it again.
Is this the same as a CRO programme?
The app is the testing layer. The CRO and Scale Plan is the team that researches, designs, builds and reads the tests with you.
Work with us
Want to see Shopify A/B testing in your theme?
Book a discovery call about a CRO programme, or book a product demo if you want to start with the app.
Work with PM Digital.
Book a call with Paddy, our founder. It's a chat to see where the brand is and what it needs. We'll do an audit only if it's needed.
- CRO sprint £4,000 one-off
- The CRO & Scale Plan £6,000 / month
- CRO and creative From £10,000 / month
The 90-day guaranteeIf we don't get you a winning test in 90 days, we work the next 30 free until we do.See terms