The iTrain 2 remote is a universal App for the iPhone, iPad and iPod touch (iOS 5 or higher) to control your locomotives. It connects as a client to iTrain 2 Pro in Server mode and cannot be used on itself.
Before starting the App you have to configure the network settings in the Preferences of the device (so not in the App itself). You have to supply the name or IP address of the iTrain Server. You can easily find the server address on the iTrain application at the bottom of the main window when double-clicking on the Clients icon. See the iTrain manual for more details.
The buttons at the bottom on the left are for starting routes in Automatic and Semi-Automatic mode (green), Finishing the route (yellow) and Stopping the route (red). With the buttons at the bottom on the right side you can reserve the next block in the direction of the locomotive (+) or withdraw the reservation (-) when no route is active.