5pb has officially announced it will be releasing an iOS version of the visual novel Steins;Gate, expected to go on sale this summer. The iOS version will be based on the Xbox360 version and will include the same scenario and voices. It will require iOS 4.2 and above and the iPad will be receiving an "HD" version unlike the iPhone/iTouch. Pricing and other details will be announced at a late date. Steins;Gate was first released for Xbox360 in 2009 and then the PC in 2010. A PSP version was released June 23rd, 2011.
From Famitsu, here are two gameplay videos: