The game and its updates are free.
If you are asked to pay for installing the game and downloading its updates, please reenter Play Market/Game Center and make sure that you are downloading the original app and not a fake one with a similar title and icon.
If you are asked to pay for installing the game and downloading its updates, please reenter Play Market/Game Center and make sure that you are downloading the original app and not a fake one with a similar title and icon.