Beware of any third party sites that promise you enhancements for our games (like “free gem” websites, etc). These sites may collect your personal information, money, or both, and often never deliver the promised in-game products. If you want to make an in-app purchase, the safest way is simply to make the purchase through the game itself on your mobile device. Selling, redeeming or trading virtual in-game currency is otherwise not allowed by our Terms of Service.