It is calld PC Remote Server. Obviously, it does exactly what the title says, its a remote server to your Pc! This is what it is called on the windows phone at least, so i dont know if it is on iphone or android, but im sure there are other apps that do the same thing since their markets are so much bigger than Windows'. So, if you want, you can play Mari0 on your phone, as long as you are connected to your own WiFi network. I also dont know i im the only one that knows about this, but im pretty sure im the only one to post about it. so you should all for sure check out this app
nevermind, im an idiot, mari0 wouldnt work anyway, and i wasnt thinking it was really an ad. still cool app though.