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

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.

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.

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!

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 even. Yea, for AB testing, it's rad. Theme testing and product testing with price testing also. It's legit awesome.

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 past to speed up my site and add lazy loading to images. They're very responsive, always improving and building new features and products based on suggestions.

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 hours the theme switches. It's obviously more ideal to split visitors live, but Shopify seems to restrict developers from creating this experience. Everyone on our team is always really excited about our tests and results. My 2 requests would be to add slightly more robust insights on the results table and to be able to split audiences live (fingers crossed one day shopify will let it be built!)

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 the insights to double, yes double our conversion rates in 3 months. Word of wisdom, small tests, and keep variables isolated, so you know what is moving the needle. Last but not least, Joe, the man behind the curtain is an absolute Rockstar. Like us, always putting the customer first, and genuinely concerned about us maximizing our value from the app. Fantastic product, fantastic company, fantastic customer service!