The Table Tennis Edge app enhances a player's ability to read the cues of real opponents. It has very little to do with dots popping up on a screen to improve brain function or other gimmicks sold as brain training products.
For me, the swipe feels a little more like when I'm playing. When I swipe the wrong way, I get that bad feeling which I get in live TT when I react wrong. Of course the whole body doesn't get as involved and it's just a add-on to your real training.