A command console for your Terraria tShock game server (http://tshock.co). The app connects to your game servers rest port and enables the app user to give server commands without being logged on to the server itself.
Note that the app does not work with the original Terriaria server, but the tShock Terraria server. Do not download this app if you do not know how to administer a Terraria tShock Server. Goto the Info page in the app the see what flags to give to the server when it is started.