Publisher 5pb recently announced that the visual novel, Steins;Gate, would be coming to the Playstation 3 and Playstation Vita.
Now we know that Steins;Gate will also be coming to iOS mobile devices. Unfortunately, nothing has been announced for Android.
Although none of the ports of the game have been dated, we do know that the iOS port will be released after the Playstation 3 and Playstation Vita ports of Steins;Gate have been published.