What is the best Swift Unit Testing Framework

Develop your own native mobile app - Part 4: App and usability testing

For an app to be successful, it not only has to offer convincing content and be marketed well, but above all it has to work flawlessly and be user-friendly. Therefore, basic tests are indispensable before the release of an application - regardless of whether it is a mobile app or a desktop application.

When testing apps, there is another factor that makes it more difficult: The adaptation to the various end devices is usually more complex with (native) mobile apps than with other software. In the early years of app development, this adaptation was even easier to do because there was only a relatively small selection of smartphones. In the meantime, however, there is a large number of mobile devices with very different features. The respective hardware differs from almost every smartphone and tablet model. With regard to the installed components, aspects like the processor (CPU), the random access memory (R.A.M.) as well as the Screen size and Screen resolution decisive for the reproduction of an application.

In addition to the hardware, the software a role of a mobile device. Here it is primarily those different operating systems of a platformthat affect app playback. Older operating systems can make it more difficult to use the app due to a lack of updates - and the spread of older versions of Android and iOS should not be underestimated. The variety of operating systems used becomes particularly clear when you look at the use of different Android versions: Overall, the older versions of Google's operating system are used more than the current version. This also has to do with the fact that many Android manufacturers do not deliver updates or only deliver them late. With iOS, the new version of the operating system typically reaches users' iPhones and iPads faster, but very old devices no longer receive updates from Apple, which means that older iOS versions can also be found on some Apple devices.

The variety of hardware and software on mobile devices is referred to by the term fragmentation - it poses many challenges for app quality assurance. This is where mobile app testing comes into play: This checks whether an application can even run under different conditions, and - if so - whether there are any difficulties playing back the applications. Uncovering and correcting such grievances should ensure an optimal user experience for as many users as possible. Because only if an app offers good performance and user-friendliness on as many mobile devices as possible will the application have the greatest possible range.