There is no worse app. Made by people who want to make money and is designed to make you cry and break your device. If you want to save money and stay sane, avoid this app at all costs, even if all your friends/family play it. Even worse than their previous game: clash of clans, it is interesting at first, then it makes you hate your life. In short, it sucks.
Thanks for reading my review, and hopefully you see what I mean if you make the horrid decision to download this app.