It's funny how some developers put common search terms directly in the title of their apps. I mean, naming your game "Best Free Game" is something that would be unheard of twenty years ago. But in today's cheap entertainment soup anything is acceptable.
Angry Gran is a little ol' lady that's committed to slap citizens in the face with a folded newspaper. As it happens, folks drop their cash whenever they get hit, not to mention that street props drop cash also. There's something in the description about granny's pension money. I don't know what that is all about, but the pay only comes from the pure acts of robbery.
There are some checkpoints that you can only pass if you've accumulated a certain amount of cash. Cash can also be spent on other aggression items, as well as on improving granny's stats. It's standard fare, except that prices become so high that you might want to purchase some cash if only this game were as good as its title advertises.
I'm not saying that Angry Gran is a mindless game. There are some things to consider, like avoiding hitting policemen, which is common sense advice, and refrain from punching air, as the weapon will come back and hit granny in the face, disabling her upper motor functions for a while.
Angry Gran might be fun for a short while, but there's barely any reason to play it longer than a few minutes. And then they want me to spend two hundred bucks to have gran wield a lightsaber? No thanks.