Ten years ago, I did some experiments building an "input lag measurement device" for touch screen devices with an Arduino. https://github.com/graup/feedback-del

Ten years ago, I did some experiments building an "input lag measurement device" for touch screen devices with an Arduino. https://github.com/graup/feedback-delay-measurement https://github.com/graup/feedback-delay-measurement The research was related to QoE in cloud gaming. At that time, some Android devices had insane lag (125 ms+), whereas Apple devices were already consistently around 30ms. I assume this isn't a problem anymore nowadays.