This is now a fantastic game since they gave us the option to remove ads! If you pay a few dollars, you can have ads removed and you literally never have to watch an ad except if you want to voluntarily get additional resources. This was extremely worth it for me, because I really love this game! Totally worth a few bucks! However, they stayed true to this game being able to be played completely without spending a cent, if you are okay with watching ads. This is my favorite mobile game!