The Lionel LionChief App lets you control Lionel LionChief and LionChief Plus locomotives from your iOS device. Select between multiple available locomotives via icons matching the appearance of each unique engine. Once selected, the app provides all the features of the Lionel LionChief hardware remote control and adds additional features including individual volume controls, pitch customization of bell and whistle, remote smoke on/off, speed limit, momentum and more. Also controls accessories such as an announcement coach and powered or un-powered B-units.