Station Master is a comprehensive guide to all London Underground, original 84 Overground, and Docklands Light Railway stations. Co-created by Geoff Marshall, a Guinness World Record Holder for visiting all Tube stations in record time, this app provides detailed information on the best door positions for exits, 3D maps of all 270 Tube stations, and accessibility features like step counts and lift availability.

The app offers exit information with accurate door positions, 3D and exit maps for selected stations, accessibility details for wheelchair users, station facilities information, transport links to buses and trains, and travel tips for every station. It aims to enhance commuters' experience on London's Transport Network by providing essential station-related information.