A slim, cut down version of Sim City for mobile devices!

Taken from the Wiki (http://simcity.wikia.com/wiki/SimCity_BuildIt)

The game is free-to-play, with in-app purchases. The game utilizes music as well as graphics similar to SimCity (2013), although it is slightly downscaled in order to fit in with the iOS and Android devices' graphic capabilities.

The game consists of three main currencies: Simoleons, which can be earned in-game or bought using SimCash. SimCash, which can be earned by spending real cash or completing city achievements and Golden Keys, which cannot be bought and can only be earned by completing shipment or disaster challenges. The game starts with 25,000 simoleons and 50 SimCash on hand.