Skip to main content

Unlocking Business Growth: The Power of Mobile App A/B Testing

October 5, 2023

The average US adult uses 30 mobile apps each month, at roughly 10-12 apps per day. 

This presents an exciting opportunity for organizations and mobile app developers to attract users and grow their business. But things are not that straightforward. 

There is fierce competition in attracting and retaining mobile app users. Between the Google Play and Apple App Stores, there are 5.7 million apps. Mobile users are spoilt for choice and will delete apps with bad user experience and glitches. 

After doing the work of attracting users, keeping them becomes the key to business growth. The only way to keep your users is to continuously optimize their experience through A/B testing and experimentation.

By constantly testing and iterating, product and engineering teams can provide a better user experience and drive business growth.

In this article, we will walk you through:

  • Mobile app A/B testing and how it works
  • The benefits and limitations associated with mobile app testing
  • The tools you need in your mobile app A/B testing stack
  • How to get started with mobile app A/B testing.

What is Mobile App A/B Testing?

Mobile App A/B testing is a form of mobile app experimentation (or mobile app testing) where you take a screen in your app and create a variation of it by changing one element. This element can be your screen layout, design or features, performance, or how notifications are managed. 

You test the original screen, called the control, and the new screen, the variation, to find which performs better. You divide traffic between the control and variation. Then you collect how your users reacted to each screen. 

After analysis, you implement the screen that “won” to improve user experience, retain your users, and drive revenue growth.

How Mobile App A/B Testing Works

Mobile apps are built on different platforms with specific programming languages for each. 

A mobile app built for the Android operating system (OS), for example, uses Java as the coding language. Apple’s OS (iOS) has a different native language, Swift. 

Because of how mobile apps are built, you need a software development kit (SDK) unique to the OS you’re working with. These SDKs enable you to run A/B tests and activate feature flags on your chosen mobile OS.

Your mobile A/B testing tool will offer different SDKs to enable you to run experiments and activate feature flags. Here is a handy process for how mobile app A/B testing works:

Identify and research issues

The first step in mobile app A/B testing is to identify issues in your app. Digging into your analytics may tell you that many customers are dropping off in your checkout flow. This obviously affects your revenue directly. 

After you have identified an issue, you can further research it with a behavioral analytics tool like Heap and Mixpanel. These tools can help you pinpoint the areas of frustration for your customers when they are checking out. 

It could be that customers have trouble reading the text in your app. This may leave them frustrated as they may not see important information about shipping, adding to a cart, and continuing shopping. 

Customer surveys and interviews are other ways you can research the issues you have identified. 

Create and prioritize your hypotheses

Knowing the issues you have identified, you can create a hypothesis that aims to solve those issues. 

Your hypothesis should propose a solution to the issues and predict results that you may see when you implement the hypothesis.

Your hypothesis may be:

“Making the text on the checkout screen will reduce frustration for customers and improve conversions.”

Another hypothesis can be:

“Making important information like shipping, continue shopping, and cart bolder on the checkout screen will increase conversions and reduce customer dropping off.”

Because you may have many hypotheses, it is worth prioritizing them. You can use the PIE framework to prioritize your hypotheses. The PIE framework stands for:

  • Potential: How much improvement can be made on this page(s)?
  • Importance: How valuable is the traffic to this page(s)?
  • Ease: How difficult will it be to implement a test on this page or template?

You can assign a number 1-10 for each of these 3 areas. For example, optimizing your checkout screen may rank higher on your priorities than your home screen.

Build and run your test

To build your mobile app A/B test, you need a mobile app A/B testing tool like Kameleoon that offers you a robust platform to test on mobile devices.

To build your A/B test in Kameleoon, log into the Kameleoon App. On the homepage, click on “New Experiment”. Then select “In the Code Editor” experiment.

Kameleoon UI

Choose the kind of experiment you want to run - SDK for mobile app A/B testing. 

Kameleoon UI

Kameleoon offers the following mobile SDKs:

  • iOS SDK
  • Android SDK
  • Flutter SDK
  • React Native SDK

Mobile app A/B testing takes place on the server-side. This makes using developer resources a necessity. Using the WYSIWYG editor is not recommended as it severely limits what you can test. The changes you make in the visual editor don’t always appear correctly compared to coding them directly. 

Name your experiment. 

Kameleoon UI - New experiment with SDK

And head into the code editor to design your variation screens. After coding your variations, finalize your A/B test by attaching goals and audience targeting. Your experiment is ready to publish.

Analyze your results

Your experiment should run for at least 2 business cycles. This will help you counteract seasonality and other external factors. 

After your experiment ends, analysis is the next step. During analysis, you dig into the results of your mobile app experiment to see if your variation screen had a positive, negative, or neutral effect when compared to the original screen.

If your variation has a positive effect and beats your control, you can roll out the changes to your audience. In Kameleoon, you can roll out features to a small segment of your customers. This way you can monitor your customers’ reactions to the changes. And you can roll back features that are not a hit with your customers.

In the event that your variations lose to your control, it is an opportunity to learn and iterate on future tests. 

Benefits of Mobile App A/B Testing

Like web A/B testing, mobile app A/B testing has many benefits for product and engineering teams who build a testing program.

Validate product ideas and features

With mobile A/B testing, you can test feature and product ideas that are still in production to determine if it has value to your audience. 

Lucia van den Brink, Founder of and, says: “Without A/B testing you’ll be shipping changes blindly, which can be dangerous.”

By testing features in production, you validate features way before launch. Your users’ reaction and behavior to this proposed feature tell you if it’s worth further investment of time and resources. This saves you money and time in the long run.

Reduce risks associated with new features

With mobile app A/B testing, you get a clear understanding of how your users feel about new features in your app.

When you A/B test features, your users' reactions to these features help you determine if a new feature is worth incorporating into your app and releasing to every user. This way, you don’t release features that users do not need or want.

Using feature flags, you can further reduce any risk by seeing how a small segment of your audience reacts to the new features outside of a test. This takes the guesswork out of planned feature releases. 

Boost user engagement and retention

When you A/B test on your mobile app, you are actively optimizing experiences and improving your overall app for your users. This goes a long way in boosting user engagement and retention.

When users encounter an area of frustration like an unclear checkout flow or slow loading times, they tend to leave the app. This reduces how often they engage with your application. But when this issue continues with no fix, your users will look for alternative apps - increasing your churn. 

By A/B testing your app, you stay on top of improving features and eliminating areas of frustration for your users. This keeps them using your app for years to come. 

Limitation of Mobile App A/B Testing

Mobile app A/B testing is resource intensive - it takes developers to code your test and time to run your test.

“App testing is much more complicated than experimenting on the web.” Lucia van den Brink continues. “First of all the code has to be written by Android or iOS devs, secondly the change has to be released to the app store and downloaded by the user which makes the experimentation program slow.”

Unlike A/B testing on the web, mobile experimentation involves several members of your team working on getting the experimentation coded for its native mobile platform. Users who are going to be bucketed in the test need to download it from the App Store for things to continue.

This can slow down the experimentation pace considerably. 

Another limitation is that quality assurance testing of your test will draw on developer resources. This can make it hard for your CRO manager to preview experiments and launch themselves without the help of a developer.

Mobile A/B Testing Examples

There are many areas where your product, engineering, and optimization teams can A/B test in your mobile app to increase engagement, customer retention, and revenue:

Push notifications

Notifications are one of the ways your customers are prompted to engage with your app. But other apps are also vying for attention with notifications. 

Your users can quickly become overwhelmed and opt out of notifications. This in turn reduces your overall user engagement. 

A/B testing how often you send push and other notifications from your app to your users can lead to better engagement. Knowing that your app only sends necessary notifications can boost your user engagement. 

Meetic homepage

Meetic, a French dating app, used Kameleoon to test its push notification system. Meetic noticed that some of its users opted out of push notifications which decreased user engagement. 

By testing their push notification system, contextualizing it for their users, and how often they sent notifications, Meetic increased user engagement by 3% in their user segment that opted out of notifications. 


Another area your team can test is performance. Optimizing your app performance can go a long way in increasing your users’ engagement and retention. 

If your app is available in multiple countries, the performance of your app will differ as users in countries with less developed data infrastructure may find your app takes too long to load screens. This may force them to look for alternatives. 

Facebook offers a lite version of all their apps to keep their users who live in places with slower internet connections.

Facebook app page

While maintaining two apps is a lot of work, you can still optimize your app performance. Optimizing the performance of your app to load fast and work with the available internet connection of all your users, regardless of location, goes a long way in increasing user retention.

Checkout Flow

Your checkout flow directly affects your revenue. The number of customers who make it to this screen but do not convert can affect your bottom line.

There are so many things you can optimize in your checkout process to reduce the number of customers who drop off. You can A/B test:

  • Placement of your free shipping notice to increase the attention of customers who will meet the threshold.
  • Free shipping thresholds to see which amount drives more revenue.
  • CTAs that contain relevant offers that customers may not be aware of.
  • Product recommendations of upsells and cross-sells to boost the purchase of other products in your catalog.


Like Hello Bank, a Digital Bank, you can A/B test the first screen customers see in your checkout flow to increase the number of customers who make it to the end. 

Hello bank mobile app page


Through optimizing the first step in their account creation process, Hello Bank increased account creation by 23%.

How to Build a Stack of Mobile App A/B Testing Tools

An experimentation tool is absolutely necessary for mobile app A/B testing. But it is not the only software that should be in your mobile app A/B testing tool stack.

To build a proper stack of mobile app A/B testing tools, you need:

  • Customer data platform (CDP) - to handle visitor data whilst respecting their privacy
  • Data warehouse (DWH) - store information for further analysis
  • Analytics software - dig into the results of your experiment for insights that grow your business.
  • Behavior analytics software for mobile apps - to get customer point of view and understand your customers better.
  • A/B testing and experimentation platform - create, launch, and analyze tests on your mobile app. But that isn’t all your experimentation platform should do. It should have feature flag management capabilities to enable you to roll out updates to a small group of users before everyone else. 


When choosing tools to build your mobile A/B testing, ensure that the different software integrates with each other and other tools in your marketing stack. A great example of a mobile A/B testing tool stack includes:

  • Kameleoon is a Feature and Full Stack Experimentation platform that can help you update in near real-time with variables, test feature updates on a segment of your users, and experiment and personalize your mobile app to increase retention, engagement, and revenue.
  • Tealium as your customer data platform
  • Heap as your behavior analytics software
  • Google Analytics as your analytics software
  • Big Query as your data warehouse.


Kameleoon integrates with all the other tools in this stack. This enables them to share data with each other without bringing in additional tools. Other Kameleoon integrations include Mixpanel, Amplitude, Segment, Mapp, and mParticle. 

Best Practices for A/B Testing Mobile Applications

When you get started with A/B testing your mobile apps, there are a few practices to keep in mind.

  1. Identify areas of your app ripe for testing: To identify areas of an app that are ripe for A/B testing, it's important to analyze user behavior and feedback. Look for areas of the app where users may be experiencing issues, or where they are not engaging as much as you would like. These areas may be good candidates for A/B testing.
  2. Set clear goals and hypotheses: Before conducting an A/B test, it's important to set clear goals and hypotheses. This helps ensure that the test is focused and that you have a clear idea of what you are trying to achieve. By setting clear goals and hypotheses, you can also ensure that you are able to draw meaningful insights from the test results.
  3. Choose the right metrics: Before conducting an A/B test, it's important to identify the metrics that are most important to your app's success. This could include user engagement, retention, conversion rates, or revenue. By choosing the right metrics, you can ensure that your A/B test results are relevant and actionable.
  4. Test one variable at a time: To get accurate results from an A/B test, it's important to test one variable at a time. This could include variations in design, layout, or features. Testing one variable at a time allows you to identify which specific change is responsible for any differences in user behavior.
  5. Use statistical significance to evaluate results: When evaluating the results of an A/B test, it's important to use statistical significance to determine whether any differences in user behavior are statistically significant. This helps ensure that any observed differences are not due to chance.
  6. Continuously monitor and analyze results: A/B testing is an ongoing process, and it's important to continuously monitor and analyze results. This helps ensure that your app is always optimized for the best possible user experience and performance.

Getting Started with Mobile App A/B Testing 

When testing different areas of your app and analyzing user behavior, you need a partner A/B testing and experimentation solution to enable your mobile app A/B testing program. 

Kameleoon is a Feature and Full Stack Experimentation solution that can help you test and iterate on your app improvement, ensuring that it meets your users' ever-changing needs and preferences.

Topics covered by this article