Help with in-app purchase

Hi guys, I need your help with the in-app purchase.
I want to add in-app purchase to my game, but I don’t know how.
I want to know what it the perfect tool for that and how to setup it in my game.
And thanks for everyone who try to help me.

Depending on the platform you’re targeting, you’ll need a billing plugin which handles transactions with the app stores. Prime31 has been around for a long time and is probably the most widely used solution, their iOS/Android plugins are at $70 each or $130 combined. But there are other providers too, e.g. Unibill or Neatplug. With these plugins you’ll have to code the store logic for your purchases, such as the store itself, buying items, restoring them, saving purchases etc.

I developed a store solution that handles all of those things, so you just have to programmatically tell what happens when the user buys an item. It’s in my signature and currently supports Prime31 plugins, if you’re interested. Much success!