One of the cornerstones in mobile app testing is the efficient use of test automation, with real hardware, making all that to work for you efficiently, and seamlessly integrate with your development and testing process. You know, the whole beef with test automation is that you can simultaneously run tests on different devices, preferably tens or even hundreds of those, to get comprehensive understanding of real behavior of your app on real platform. As discussed, there are myriad of different combinations when you consider OS version, hardware setup with all its diversity, networks, user conditions and many other things. Running something in concurrent – or parallel – mode will get you great details how things actually perform. Let’s take a look at some fundamentals of mobile app testing and how to use parallelism / concurrency to deliver you a significant value.