Case Study: Zimad Gets 36% Conversion Uplift by Optimizing Screenshots for Japan

Conversion Uplift by Optimizing Screenshots for Japan


People prefer visual content over text. Applying this trend to app store optimization, it becomes crystal clear that publishers should pay close attention to such product page elements as screenshots, icons, etc. After all, screenshots take a great proportion of app’s store page and get the the best part of users’ attention.

Yet, how to turn your visuals into a converting machine?

The internet offers loads of information on how you should design your icons and screenshots, but constant experiments of our clients prove that every game and app is individual.

Sure, there are some common app store screenshots patterns that you can use, but it’s important to keep in mind that every target audience will react on them in a different way, maybe even in opposite. Especially, when it comes to designing screenshots for new regions.

That’s why it’s essential to make optimization for different markets an integral element of your ASO strategy.

Valeria who leads app store optimization in Zimad shares their case study on using app A/B testing for optimization of their app product pages for the Japanese culture. 

Why is it important to optimize app store screenshots, not just localize?

Our testing ideas come out from the App Store design trends. We want to understand why our competitors and the top apps in general do what they do, is that efficient and why.

We also try to use psychological patterns from the human behavioral studies in our visual design to engage users in interaction with our app.

People react better, in a more positive way when they recognize familiar images, something they see every day.

We clearly understand that the mentality differs a lot from country to country, especially for the Asian market. People have different values and lifestyle experiences. Thus, we should do our best to deliver the message in the way that will resonate with the audience and won’t seem strange.

The screenshot optimization for different cultures is crucial.


Because people react better, in a more positive way when they recognize familiar images, something they see every day. This process of recognition is called “processing fluency”. A brain tends to react faster on simple and accustomed images, generating a pleasant feeling, that in turn can convert into a download.

What were initial results from screenshot optimization?

This was our first localization experiment for our Magic Jigsaw Puzzles app. Before changing our screenshots in the App Store we had two tests in Splitmetrics to make sure that the change won’t affect our current conversion rate in a negative way.

In the graphic below you can see how our conversion rate changed after we optimized our app product page for Japan.

The change resulted in 36% conversion rate increase.

The change resulted in 36% conversion rate increase
The data is from the iTunes Analytics

And this is just a beginning as we are planning to make more tests for the Japanese region to understand its audience better and attract new users with the images they’d love to see.

App A/B testing platforms such as SplitMetrics are a great option as it would take forever to test everything in the real environment. It’s also very risky because you may lose current advantages.

What to remember when localizing app product pages?

When optimizing your localized screenshots, the important part is to make sure that you also optimize your user acquisition interstitials accordingly.

In fact, even after setting a winning screenshots set in the store, you may have a loss of conversions just because your unoptimized interstitials attract different audience. That was a mistake we made once and will never do again.

The hardest part was trying to “copy” Japanese style. We made a lot of research on this, analyzed top Japanese appsperformance of all our Japanese interstitials for different games to find some iterative pattern.

We found that native publishers in Japan often use lots of small elements in their promo, adding special effects and emotional captures all over the image. For our European eye it looks insane and the example with the processing fluency that I’ve mentioned above contradicts Japanese mentality.

app store screenshot optimizaion localizaion ximad splitmetrics

When designing the Japanese screenshots for one of our games, it felt like it was not “Japanese” enough, so we were adding more and more cultural elements. The designer said he had never done anything that crazy before.

When you’re going for a new region, you should be ready to see ordinary things in a new manner.

So, when you’re going for a new region, you should be ready to see ordinary things in a new manner, be open-minded, dive into the culture and explore it by watching videos, learning history and cultural nuances.

How to tap a winning variation?

We’ve noticed that if our new screenshots set wins a test with a little advantage (around 1% difference in the conversion rate), that wouldn’t guarantee the gain of conversion in the real environment. It may even result in the convesion rate decrease sometimes.

Before noticing it, we were surprised that we hadn’t seen any positive changes. So make sure that your winning set overcomes the control one by at least 2% to get the real visible benefits.

app store screenshot optimization ios localization splitmetrics ximad

Tapping variations that finally give higher conversions becomes easier with every new A/B experiment. You analyze mistakes, A/B test and repeat. Keep going until you have the results you are satisfied with.

We continue testing, even though I already see a huge increase in conversion rates. The next challenge for us is to overcome ourselves and break our own records.

What are the key takeaways and what about Zimad’s future plans?

As they say “There is no limit to perfection”, but everyone strives for it, so do we. We have a lot of interesting and unexpected ideas that we’d like to test, and we’d love to surprise our potential users in a good way. I think it’s time to be more creative, because people are tired seeing the same screenshots and icons over and over again.

A/B testing Takeaways of Zimad

  1. The work in app store optimization mostly consists of the research, as it’s vital to study competitors, target audience, and their preferences very carefully to know exactly how to design the promo materials for an app.
  2. Localization is optimization for another culture. Preparing your product page for a new market, you should consider as many cultural peculiarities as possible. Your user acquisitions interstitials should be optimized accordingly.
  3. If a variation wins by 1% or less during an A/B test, you shouldn’t upload it to the store straightway. Only the advantage of at least 2% can result in conversion rate changes in the stores.
  4. Learn from your mistakes. Such analysis helps to empower your further A/B testing and marketing activity.
  5. A/B testing is an everlasting process. Even if you’re satisfied with the results, there’s always room for improvement.