I also agree with you klods hans.
I have played on my computer- nice large screen, mouse, beautiful color, and my Ipad- still good sized, easy to see and read, really works very much like computer- if there is much difference I have not noticed it. I have tried using the app on my iphone- when I was traveling- and that was awful. Much too small, hard to see depending on the light or lack thereof. I use my phone- cell phone (which does have more power than my first computer did!) for several things but when I want to play COMPUTER GAMES-- I play on my computer and my nice LARGE monitor. If I have to play on an app- I will find somewhere else, and something else to spend my time and money on.