This app can be downloaded from here:
https://play.google.com/store/apps/deta ... ssdirector
https://apps.apple.com/us/app/quizxpres ... 1493187163
When starting the app, you first need to link it to the computer with QuizXpress that you want to control. This can be done by scanning a QR code with the app. You can find the QR code on the QuizXpress computer, in Quiz Setup on the Mobile page. The app can be used to control several different QuizXpress systems when needed. You can add as many as you want to the list by scanning each PC's QR code.
Once you have the computer registered in the list you can start controlling it once a quiz is running on that computer.
There is however one important thing to keep in mind; as your quiz can run on different buzzerpad servers (e.g. buzzerpad.eu or buzzerpad.com) you will need to tell the app where it should look. So, before connecting, go to the app's settings page and select the correct game server there.