Hearthstone, the card game hit from Blizzard set in the Warcraft universe, is finally playable on mobile devices for iOS and Android as of today. So also on iPhones and other smartphones.
Players had to wait a long time to play Hearthstone on the device they most likely had with them on the go: their phone. That changes starting today.

Without much announcement, Hearthstone has been released in the mobile version. According to the US magazine Forbes, Hearthstone will soon be available for download in the Google Play Store and the iStore. It is on its way there and will appear in searches shortly.
It seems that the mobile era for Hearthstone is finally breaking through. In the past, experts had already predicted that the successful game would hit hard on smartphones when it can be played during short breaks, on train rides, or elsewhere.
At the moment, Hearthstone is not yet available in the Play Store and the iStore, but that should change soon. It should be available there quickly.
Hearthstone runs on iPhone, iPod, or iPad and here you can download it
Update: Here is Hearthstone Mobile in the iStore. It requires a system requirement of an iPhone 4S or an iPod touch of the 5th generation or an iPad 2 or newer models.
And here you can download Hearthstone for Android
You can download Hearthstone Mobile for Android in the Google Play Store. The download is 619 MB.
And here you can find the Hearthstone Phone version in the Amazon App Store.