A free program for Android, by App Swim LLC.

Do you want to play an exciting yet challenging game using your mobile device? Or do you love to have your own city subway? If so, then you must try to download this game. This is the Subway Idle 3D game for Android. The gameplay is very simple and easy to understand, all you have to do is to upgrade and maintain a subway rail station for a growing city. 

You need to manage and connect them with other stations to keep your trains on track. As you build new stations you will earn money for future upgrades and maintenance of your subway. Download and install now!