Thread:Su712/@comment-27024444-20150920172307/@comment-25669516-20150922202837

Yes it is. The game checks your license, downloads Cloud-to-device messages, events info and also checks to insure you are not cheating in the game. For that it needs internet. So every once in a while it may ask you to connect to wifi to proceed, especially if you are logged in with a Google+ account in the game or if you changed the date/time on your device manually for some reason and then changed it back.