Even if you pay the fairly cheap price for the ad free version there are still things locked behind ads which is super annoying. You paid to play uninterrupted. . . . only to still have to watch ads to get further into the game. Then when you watch the ads it breaks the game because it wants to show you another ad but you paid for ad free so you have to close the app completely in order to play it. It is fun but for something I paid for I'm a little disappointed.