Theme Scientist A/B Testing

No-code AB testing for your theme and products!

by PreviewX · Launched: March 2020

3.5 (10) on Shopify Used by 201 Shopify stores

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Easy A/B testing with no code. Schedule changes to see which AB test boosts conversion rates.

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About Theme Scientist A/B Testing

Maximize your conversion rate by understanding what drives customer conversions. With Theme Scientist, you can conduct AB testing on your Shopify theme effortlessly and without code. Each theme test delivers critical data to optimize your store and improve sales. Our no-code solution makes it easy to experiment with theme and product details. Plus, our scheduler allows you to time updates, providing deeper insights and greater control over your Shopify theme’s performance. Run AB testing on your Shopify theme – learn what improves conversion rate! Run AB testing on your products – change titles, descriptions, and more Use AB testing results to enhance customer experience and boost conversion rates Easily schedule changes to your Shopify theme for timed promotions! Dedicated support – need help setting up a a theme test? AB test products? Show more Show less

Last verified: July 15, 2026 · Fresh

App details

Developer: PreviewX
Category: Store design
Pricing: Paid
Launched: March 2020
Rating: 3.5 (10) on Shopify

Key features

14 day free trial
Theme A/B testing
Product A/B testing
Analytics
Theme scheduler

3 plans · 14-day free trial

Tester

$9.99/month

Tester+

$19.99/month

Tester Pro

$29.99/month

Plans and prices as listed on the Shopify App Store.

Ratings & reviews

based on 18 Shopify App Store reviews

Use the arrows to read individual reviews

It is an excellent app for future time scheduling.

— Jeans4you.shop

This is a very useful app, and it's free! Helpful support staff, easy to use, I'm very happy.

— Elizabetta

This app is easily one of our favorites and most used tools. We've used it to test multiple growth ideas and increase our revenue by over $50k a year so far. Developers are responsive, kind and very helpful. They've even introduced me to other products and people that could have been a better option for us. We want to test store-wide features so we create 2 versions of the same theme, and every 24...

— Ministry of Scent

Great app! Our team has been using this app for over a year to run A/B tests on products and website features - always testing something. We use a set it and forget it style: create a test, wait a few weeks or so, analyze the results, then start another test. The best for us has been testing product prices. Finding a better product price is golden!

— Tree Tribe

I really like the interface and i am nearly fully happy! BUT i would like to set the swapping times to something uneven, like 1/3/5/7/9 hours in order to really give every option the same time frames during a day. If i put my A/B test to swap every 4 hours for example, A would get 8-12 and 16-20 o clock every single day, which would mix up by swapping them every 3 hours. I would love, that you upd...

— Haltungshelfer

Great app for those looking to make more informed decisions when it comes to theme updates. Also the support team is very responsive.

— Lift Down

We use the app free features to schedule theme change (for our sales, flyer, etc.) it is really easy to use and effective. The changes are done at the time scheduled. The support team is really nice too!

— Le Monde au Naturel

The best split-testing app I've tested so far, there is everything I need and the customer service is super reactive! I also suggested a new feature and it got added !! 100% recommended

— Turtles Project

This is a beautiful app! Don't let the currently small number of reviews turn you off. It's ease of use, simplicity, and effectiveness are top notch. It works like an absolute charm. And apparently - the dev crew is fantastic also, that's why I'm writing this review, I casually mentioned a feature I thought would be good, and wouldn't ya just know it, they said they will add it in - and quite soon...

— Spirit Magicka

Don't let the lack of reviews for Theme Scientist scare you away. We actually tried them all, and were ready to give up when we took a shot on TS with no reviews. Wow, intuitive, exactly the type of tests we were looking for, and unlike some of the others, it never broke themes while testing. We are actually in the ABT mode (Always Be Testing) now for life now, and this App has already given us th...

— Rings By Lux

Super clean, powerful app that lets you alternate between themes for split testing. Being able to customize an entirely separate theme gives you almost unlimited flexibility to tweak and test. It tracks the views, add to carts, conversion rates, and provides statistical significance levels so you know when to choose the winning version. The team behind the app are great, I hired them in the pas...

— Chef's Vision

That is the A/B Split testing App I was waiting for long time! We know the developer through his expertise in speed optimization. Great customer support, with passion that always goes a extra mile! We were also told a few more features are in the pipeline for this App. Thus, we are really exited to see this app developing even further!

— NUTRILOVERS | #WissenWasDrinIst

They change their plans so you have to keep upgrading to keep using the same features.

— Soccer Maxx

don't even deserve to give a star ,the app isn't even responding

— HudaOrganics

Customer support is really bad at responding to this app. Our data had discrepencies that don't make sense/ need explanation on almost every test and their team does not get back to you for at least 5 days when you have a question, sometimes never.

— Print Your Places

Great concept poor execution. I have been trying to get in touch with someone from support for the past couple days. The metrics that are being shown on the AB test are not accurate and due to that we are being shown false metrics on which test is winning.

— Altered Way

It's the perfect tool to run AB Test on the Theme, simple and efficient. Unfortunately, at the moment I start an AB Test, I have visitors from the US, tons of visitors and all my KPIS are skewed. That's very sad.

— Soin Amalthée, le savon au lait de chèvre naturel et fait en France

I used this app to run a test on the color of the buy button. It was easy to set up and it ran without a hitch. I did get a clear winner. I had an idea to make it work better and reached out to Joe, the founder. He was very responsive and did implement my suggestion. I highly recommend this app.

— My Backyard Decor

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