King of Hearts is the trick-taking card game Hearts, where the object is to score as few points as possible: every heart costs one point and the queen of spades costs thirteen, so most of the game is about avoiding tricks rather than winning them.
The exception is what makes it interesting. Take all the hearts and the queen — shooting the moon — and every other player takes 26 points instead of you. It's the reason a hand that looks disastrous sometimes isn't.
Taking all thirteen hearts and the queen of spades in one hand. Instead of scoring 26 points, you score zero and every other player takes 26.
She's worth 13 points on her own — half the points in a hand. That's why passing high spades away is standard unless you're holding low ones to protect her.
Yes — tap to play cards. Nothing to install.