Hearthstone is sliding down iPad's top-grossing charts — expansion as well as iPhone, Android versions will help

Blizzard’s free-to-play collectible card game isn’t blazing as hot as it once was, but the developer’s plans for Hearthstone should help.

Hearthstone: Heroes of Warcraft, which has players facing each other in one-on-one competition online, is no longer in the top 20 highest-grossing iPad apps. Right now, in the U.S., it is No. 23. That’s not terrible, but it puts it well outside the realm of something like developer King’s Candy Crush Saga puzzler or even its Pet Rescue Saga in terms of money-making power. Hearthstone debuted strongly for iPad in April, but it isn’t maintaining its momentum as well as other top mobile releases. This doesn’t mean Blizzard doesn’t have the cards in its hands to make a comeback.