Mobile App Testing 101: Ultimate Guide to Release Your App in 2020


There are plenty of reasons why the mobile apps become successful: the brilliant idea of the customer, ingenious developers, cool development process management, competent promotion and marketing strategy, etc. But there is one more element, which is critical for successful app release – mobile app testing. Whatever developers do, no matter how marketers and managers work, the lack of QA app testing can make everything collapse into a black hole. Probably, you guessed that today we’d speak about how to test a mobile app. Get ready to dive into the details of our mobile testing tutorial. 

Installation testing

So let’s get started. What does a mobile app user do first? Right, they install the app. Here’s the first phase of mobile application software testing. QA engineer is obliged to make sure that the user will not experience pain and suffering during installation. At this stage, you need to determine whether the application will be installed on different operating systems. Mobile application installation testing is an integral part of comprehensive application testing. You must test installation from scratch; install on top of a previous version; interrupt installation; uninstall the app. At the initial stages of mobile app testing, when the application installed on top of the previous version, it might not work correctly. But don’t be afraid, further automated app testing will help to eliminate this error.

Compatibility App Testing

What is mobile app testing without compatibility testing? Its primary goal is to ensure that an application can successfully “travel” from one environment to another. In other words, this stage is necessary to determine if the product is ready to run on different platforms with different hardware and/or software configurations. It is critical for cross-platform applications designed for Android and iOS at the same time, so Android app testing and iOS testing are right on cue. What can trigger compatibility issues?

  • Lack of RAM;
  • Lack of storage space;
  • Specific processor and operating system types;
  • Compatibility between different kinds of operating systems.

Stress Testing

The third step is intended to detect the behavior of the app in unusual (stressful) conditions. Stress testing includes both external and internal factors.

External factors: speed/stability of network connection, switching between Wi-Fi and 3G/4G, incoming calls/messages during app operation, devices connection (headphones, Bluetooth gadgets, etc.), removal/replacement of SIM or SD-card while the phone is on, switching on/off sleep mode, air temperature, etc.

Internal factors: lack of RAM or storage space, low battery, disconnection of any services (e.g., GPS), etc.

Performance and Load Testing

Mobile app performance and load testing is the fourth step, which determines whether the application has any vulnerabilities — for example, memory leaks or performance problems. Mobile application load testing assumes that the program will run successfully on a low-memory device.

Functional Testing

During this step, the QA engineers detect whether the application may collapse under normal conditions of use. In other words, functional testing is needed to understand whether all functions of the app work properly. Let’s highlight several points to which QA engineer pays attention in the first place:

  • Gestures;
  • Physical/on-screen keyboard;
  • Screen orientation (horizontal/vertical);
  • Non-standard control elements.

Localization Testing

This type of mobile app testing is similar to localization testing on web or desktop systems. During localization testing, the application operation in the selected country, texts, and interface translation are checked. In the process of localization testing, QA tester pays special attention to content and user interface. Namely:

  • Which languages the application supports;
  • Accuracy of translation of various interface elements;
  • Accuracy of translation of documentation and FAQ/Help sections;
  • Correct current date, time, etc.

Usability Testing

The seventh step is designed to evaluate the UX of the mobile application. What does usability even need for? To simplify the mobile app use, adapt the program to the needs of users, and eventually increase the popularity of the product and conversion. During QA usability testing, the engineer detects navigation errors and other bugs associated with the mobile app display. For example:

  • Graphical interface elements;
  • Efficiency of elements interaction;
  • Color grade, etc.

Automated Testing

Today, automation is the key to successful mobile app testing. It saves a lot of time and improves app efficiency, when it gets more additional features.

So, when is Automated Testing a good idea? Use regression testing for existing application functions retesting in the cases, when they are implemented in the new app version. You can use smoke testing for app quality assessment and decide on additional in-depth tests. Lastly, data-driven testing will be useful when you test app functions, where the same functions have to be ratified based on large data sets.

If you expect your mobile app to be successful but don’t plan to application testing services for it, we have to upset you. Triumph will have to be postponed. Only testing identifies all the vulnerabilities of your mobile app, improves usability and performance, and increases the product’s chances of commercial success.