Blizzard TCG Hearthstone: Heroes of Warcraft is now out on the iPad. The supported devices are the iPad Air, iPad 2, 3rd, 4th gen as well as the iPad mini and iPad mini with Retina. If you already are playing Hearthstone on the PC your collection and progress will be shared across all the devices. For new players completing an introductory mission will get you a free pack of cards. If you are already playing Hearthstone just go in to Play, Arena, or Practice mode to earn that bonus card pack.
As with all Blizzard games an internet connection is required to play as well as a Battle.net account. Just download Hearthstone: Heroes of Warcraft from the iTunes App Store.