In a recent announcement Blizzard revealed that Hearthstone® is now playable on iOS® and Android™ phones.
With a new intuitive interface hand-crafted for the mobile, the experience is designed for the small screen gaming experience.
Now I can play while on the bus I guess ;)
The game shares the servers of all Hearthstone as expected, so your existing tablet and PC players, and anyone who signs into their account will find their existing decks, stats and card collection carried over. As per before, progress is stored on the cloud and can be resumed on any device. In addition all players who sign in are rewarded with a booster pack.
Read more over at their announcement.