SimCity Build it is Free to download for your mobile devices however it comes with lots of add ons which you have to buy to play further .i have managed to play and so far i had good experience playing this game . Sim City Build it requires a decent mobile device . There were lots of updates which came after release and every upgrade or update there were something new added on . You never get bore from this game and those who never managed to play Sim City for computer they have alternative mobile game to play and on your mobile device. Its FREE but add ons does require real money to buy new add ons .