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Mobile app testing – A complete guide to testing Android & iOS mobile apps

Do you ever re-read your email before sending it to a superior? There is a good chance a lot of people reading this blog probably go through an email before sending it. It is a simple part of professional communication. An error-free email helps ensure the recipient gets the right message.

In principle, mobile app testing comes from a similar school of thought. It makes sense to test an app thoroughly before making it live on an app store. Users can get a better idea about an app when it’s free of bugs and performance issues.

Companies tend to put their apps through a number of testing stages with the help of various mobile app testing tools.

How often do you come across obvious errors when using a popular app? The chances of bugs hampering app performance in a significant way are small. This only speaks to the high standard of testing apps go through these days.

The following section will offer a complete guide to readers on mobile app testing. Readers are advised to study the points made in this piece before jumping into mobile app testing tutorials and services.

In this blog

  1. Mobile app testing – The essentials
  1. Types of app testing
  1. Top mobile app testing tools
  1. How to test a mobile app? A step by step guide
  1. How to test an app on AppMySite?
  2. Frequently asked questions

Mobile app testing  – The essentials

What is mobile app testing?

In simple words, mobile app testing is a process performed to identify bugs, performance obstacles, and design issues in a given app.

A writer who writes a long manuscript would naturally need a competent copyeditor to resolve typos and grammatical oversights.

Mobile apps are the same. Developers can leave out small bugs that hamper the overall user experience of an app. App testing as a process is solely dedicated to correcting any issues that arise during design and development.

Testing an app is not a simple matter of opening every mobile screen and looking for bugs.

There are different types of app testing methods professionals use to weed out different types of bugs. The following sections cover the different types of app testing and the tools generally used in the process.

First though, we will discuss the tactical need for app testing.

The need for mobile app testing

We previously discussed the basic importance of mobile apps. The following points will help users see why they app testing is important

  • Increase in smartphone models – There is a growing number of smartphone models of varying sizes and performance capabilities. This means apps have to be compatible with many more smartphones now than ever before. A sound app testing process can ensure any given app build is compatible with a variety of smartphones
  • Script issues – Apps today use a wide range of input methods, keyboards, and menu structures. This makes it difficult to work around a single common script.
  • Cross-OS compatibility – Smartphones these days use two primary operating systems – Android and iOS. It is important that an app performs well on both systems. App testing can help ensure the same.
  • Compatibility with ISPs – There are a number of active internet service providers (ISPs). Apps have to work well with each operator to reach a large audience. After all, app users can’t be expected to change their ISP to use an app. App testing helps establish connectivity for multiple operators across the board

These four points point to one key modern challenge – variety. There is variety in smartphones, operating systems, ISPs, and scripts.

Mobile app developers have to cut across this challenge of variety and offer a unified app experience. Only a stable app testing process that validates performance across all factors can help achieve the same.

Types of app testing

As mentioned earlier, app testing is not just about opening every app screen and finding bugs. There are many types of app testing. They are explained in the following sections.

#1 – Automated testing

Automated testing simply automates the process of testing a mobile app. There are a number of repetitive tasks that do not require the constant attention of app testers. Automated testing can help in such situations.

Automated testing requires regular oversight. Furthermore, it is not at the stage where professionals can ignore manual testing.

Some of the advantages of automated testing include –

  • Faster app testing with automation of complex processes
  • Simplified resolution of issues because of integration with existing app build
  • Greater accuracy in testing process
  • Overall improvement in turnaround time and build quality

#2 – Manual testing

Manual testing is the opposite of automated testing. It involves actual app testers putting an app through a number of different conditions.

Every app requires some level of manual testing. Automated test runs can only discover bugs to a certain degree. There is a natural need for companies to lean on human app testers.

There is a lot of time spent in the app testing space pitting manual and automated testing against each other. This is a wrong way to look at both.

Manual and automated testing are both important. Forgoing either one for the other does not help the overall goal. Most apps that perform well right off the bat are generally tested across both manual and automated testing mechanisms.

#3 – Functional testing

Functional testing is the most basic form of testing an app. It essentially tests whether an app meets certain standard requirements.

Let’s say you’re about to launch an ecommerce app. You built the app using a free app maker. The first piece of advice you might get from a seasoned app tester is to perform a functional test.

What would a functional test for an ecommerce app entail?

Generally, functional testing covers basic stuff like user interface and flow. Thus, functional testing for an ecommerce app would involve checking the basic UI of the app. It would also entail checking the overall product discovery and checkout process.

Most apps generally pass the functional test with ease. The more practical purpose of functional testing is studying mobile app design. Functional app tests help companies see if the app’s design meets the expectations they had earlier.

#4 – Performance testing

An app doesn’t always get ideal conditions to work with. There are a number of difficult conditions where an app has to perform. These conditions can range from low battery to poor network service.

Performance testing basically involves testing an app in less than ideal conditions. Let’s take an example. Assume you decide to create an app for your WordPress blog. You eventually succeed in making one with an app creator online without coding.

Your audience happens to casual readers who will only read your blog while traveling to work every morning. They would naturally access the app with their cellular internet connection which is much slower than normal Wi-Fi.

Can your app provide an optimal experience? Performance app testing can help shed light on the same. It basically puts an app through all well-known ‘difficult’ conditions. The app is only given the green flag if it meets a certain performance threshold. For obvious practical reasons, performance testing is one of the most important forms of app testing.

#5 – Usability testing

Usability testing

User experience plays a large role in the success of an app. It is generally difficult to constrict user experience to a particular part of an app. It encompasses many different tenets.

Usability testing is an app testing method that validates the overall user experience of an app. Some of the things checked in usability testing include response time, mobile navigation ease, and basic intuitiveness. One of the key goals of usability testing is studying the overall placement of various buttons, menus, and CTAs. Processes like user flow also come under the scanner.

The overall objective of usability testing is studying the overall experience of using the app. It has the mandate to test and provide suggestions for a whole range of app modules.

#6 – Security testing

Security testing essential tests checks the ability of an app to stand against malicious hacking attempts.

There are a number malicious attacks can deploy on any given mobile app. From plain old social engineering attempts to SQL injection attacks, hackers can exploit many vulnerabilities in an app.

Security testing generally involves a number of cybersecurity practices such as reconnaissance and penetration testing. The objective is to snuff out any possible security issue and nip it in the bud.

#7 – Interruption testing

Interruption testing simply checks if an app performs well when interrupted by another application.

A simple example of an interruption is an incoming call. You must have noticed a YouTube video pausing automatically when there’s an incoming call. This is a simple measure to ensure that users can attend to their calls and not worry about stopping their video.

Other interruptions such as text notifications, plugging in phone charger, data transfer with cable, and so on are all part of interruption testing.

#8 – Localization testing

A change in location should ideally bring a change in the app as well. For instance, people using YouTube in the US would get some video recommendations based on their location. Location-based recommendations are also common in other apps like Twitter and Facebook.

If an app does have the ability to change according to the location, localization testing comes into the picture. The basic goal of this testing process is to study whether an app performs as it should in a given location.

Usually, app testers use VPNs to check if an app changes its form based on changes in location. The scale of localization testing depends on the depth of changes developers create based on location.

#9 – Outdated OS testing

App users often don’t update the operating system (OS) on their smartphone device. This is especially common when the size of the update is more than 100 MB.

Can an app only be expected to perform on up to date operating systems? No. A better solution is to make sure an app performs well on the older versions of an operating system as well.

Outdated OS testing essentially involves app testers studying an app on an older OS version. This makes sure users who have not updated their OS can still use a given app.

Top mobile app testing tools

App testers use a whole range of tools depending on the type of test they’re about to perform. The following points cover three popular mobile app testing tools –

  • Test IO – This is a crowdsourced software testing platform. Users get feedback on their app from real human users. App testing is furthermore done on real mobile devices, not just emulators. Since the platform is crowdsourced, the overall speed of the testing process is also very fast. This is a unique advantage for what is essentially a manual testing platform
  • Appium – Appium is an open-source software testing platform. It provides users the option to run UI tests on devices across different platforms. One of its major advantages is that it allows the reuse of code in different testing environments. It also supports code writing tests for languages such as Python, Ruby, and so on.
  • TestComplete – TestComplete is one of the more popular app testing platforms around. It is an automated testing tool capable of running test scripts across Android, iOS, and major desktop operating systems. The best part of TestComplete is that it saves companies a lot of time creating and maintaining test runs
  • Robotium – Robotium is an Android mobile app testing tool. It supports test runs for both native and hybrid apps. Users have to create scripts for various test runs and manually check the results.
  • Xamarin.UITest – Xamarin is a fairly popular cross-platform app development technology. It also happens to offer a very stable app testing tool with Xamarin.UITest. Users can deploy a number of UI tests to check whether an app meets a certain level of performance and mobile app design

How to test a mobile app? A step-by-step guide

The previous sections provide a comprehensive overview on the essentials of mobile app testing. The topics covered are useful for anyone developing an app.

Ultimately, app testing is a process. Professionals follow a certain style of functioning for the sake of accuracy and management.

The following sections provide a step-by-step guide on how to test a mobile app.

Step #1 – Identify testing device

The first step is to choose the device on which the app will be tested.

This is the part where many companies tend to cut costs. Testing an app on a whole range of mobile devices sounds like a good idea. However, it is difficult for every company out there to procure a whole range of smartphone devices.

The easiest solution in such a case is to choose the device with the worst specs. This is basically done to confirm if an app will perform on the worst device possible.

Let’s say you create an app that requires a minimum 512 MB RAM. Ideally, you should not test your app on the best device available. Choose a device with the same or lower RAM and check if your app reaches certain key performance thresholds.

Another way of going about this is studying which device is most used by the target audience. For example, if your target audience is made up of more iOS users, it makes sense to test the app on an iPhone.

Step #2 – Test app on emulator

The second step is testing the app on a live emulator.

A live emulator is a good tool to test the basic UI of an app. Users can get a basic idea of how the app works and the overall user flow.

The important point here is to not solely depend on the emulator. An emulator cannot effectively provide accurate information about the experience of using the app. Only a real mobile device can provide data on the real experience of using a mobile app.

Step #3 – Deploy tests on device

We covered a significant number of tests in a previous section. In the third step, app testers have to deploy various relevant app tests.

In most cases, app testers have to develop the test runs based on the specific requirements of an app. Many app testing tools in the previous section allow users to write their own test scripts and deploy them on an app build.

All tests have their own importance. App testers have to look at their specific project they’re working on and choose a set of tests accordingly.

The likes of security testing can be done automatically with the help of cybersecurity tools that automate penetration testing. Other testing methods like usability testing require a more hands-on approach.

Step #4 – Compile results and resolve issues

The results from the tests help app testers see where the app is lagging. In some cases, the solutions to various bugs and issues are very simple to resolve.

In other cases, the solutions can take some time.

Let’s take usability testing as an example. The results of a usability test will point to user experience issues. Generally, UX issues take time to resolve.

Let’s take an example. Assume you build an ecommerce app with a WooCommerce Android app builder.

What if a usability test of the ecommerce app shows that the navigation across the app is too slow? This would naturally require more wholesale changes.

Some issues are more easily resolvable. What if a button is invisible because its color and text matches the background? Such an issue should not take an experienced developer more than ten minutes to resolve.

Also read: A complete guide on mobile app strategy

How to test an app on AppMySite?

app preview

Some readers who lack programming experience or knowledge may find some parts of mobile app testing too tedious.

This tediousness of dealing with code is the first reason people turn to make an app with an app creator online without coding. However, the challenge of testing an app built with a free app maker is a big stumbling block.

This is why it becomes important to choose app builders like AppMySite.

AppMySite is a reliable mobile app builder that enables users to create an app without writing a single line of code. Users can essentially turn their WordPress and WooCommerce websites into native mobile apps.

One of its unique features is offering app testing capabilities to users with the help of an app preview section.

The app preview section on AppMySite enables users to test their mobile app on both live emulators and real mobile devices.

The following points explain how to test an app on AppMySite.

  • Design your app on AppMySite and connect your website to the platform with the help of its WordPress app plugin
  • Go to App Preview. You will find both an Android and iOS emulator. You can change the Android and iOS device through the dropdown menu as well, AppMySite offers four iOS and two Android device emulators.
  • There are also features to take a screenshot and restart the testing process. App testers will naturally note the importance of such additions
  • Users can also test their apps on real mobile devices. AppMySite has a demo app on the Google Play Store. Users can download the app and login to their AppMySite account to see their app on a mobile device.

Frequently asked questions

Have questions about mobile app testing? Here are a few answers to commonly asked questions about mobile app testing. 

How does mobile app testing benefit your business? 

Your app has a big role to play in the success of your business. If the app doesn’t perform well and has a high abandonment rate, it will only diminish your visibility and app traffic. The best way to ensure your app performs well is to test it thoroughly. 

An app that performs well is more likely to deliver a smooth user experience and enhance the retention rate. If your business relies on the app for selling products, services, or another method of monetization, better retention will help you grow your revenue. 

What does a typical mobile app testing checklist look like?

A mobile app testing checklist varies depending on the type of app you have. The following steps highlight the most common tests that are part of every testing checklist:

  • Cross platform testing: Check if your app is working on all the operating systems it is supposed to. For instance, if you’ve built an app for both Android and iOS, check if it’s compatible on both systems. 
  • Device testing: Check how your app performs on different types of devices. The idea is to test your app on different device sizes and see if all the screens are displaying properly.
  • Settings & configurations: Set different settings in the app to see if every configuration is working properly. The settings can vary depending on the type of app you have. 
  • Speed testing: Check how fast your app screens load. It is advised that you test your app in different internet speeds. Ideally, your app screens should load promptly on throttled mobile internet as well. 

How can one become a mobile app tester?

Mobile app testing is a big part of every app development process. In order to become a mobile app tester, you need to be able to test your app in every possible way to ensure it offers a smooth experience. 

For starters, you need to know how to create different test cases and see how your app works in each. This naturally requires an intimate knowledge of how mobile apps work on a deeper level. 

In conclusion

There is a natural urge amongst companies launching an app to put their best foot forward. App testing basically enables them to do the same. Before launch, the app is put through several stages of scrutiny where app testers check it for any faults.

This piece provides a complete guide to mobile app testing. Readers can learn about the various types of mobile app testing as well as the tools professionals tend to use.

The latter sections cover the procedural aspects of mobile app testing. Readers are provided insights on how app testing is done on a practical level.

The final section covers how AppMySite allows users to create an app. Instead of creating test scripts from scratch, companies can simply use AppMySite to create an e-commerce app and not write a single line of code.

You can test and preview your app on AppMySite on the go. Visit our help center and get a complete guide on testing and previewing Android & iOS apps.


  1. Similar to any other stage in the mobile app development process, the testing phase also has its own significance. With the increasing number of mobile apps, the testing process is also getting hiked. Without going through the testing phase, you can’t launch the app in the market as you will never know about the involved bugs that can slow down the app’s performance and can make it unsuccessful compared to other tested apps.

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