London Underground is a comprehensive route planner for the London Underground system. It is designed for both first-time visitors and experienced commuters. The app provides an inbuilt map of the official Transport For London (TFL) map of the city underground services. It offers a unique "Minute Map" feature that provides a view of travel times from any location on the map.

The app works without an internet connection and doesn't require data connection fees. It provides the fastest route calculations of any mobile routing application using actual published journey times with the ability to select the quickest route or the route with the least changes. The app also offers GPS locating, station exit information, live service status, and departure board information.

The app is easy to use and works in both landscape and portrait modes. It can easily locate the nearest transport stop, and places of interest, parks, etc. are built into the application. The offline routing feature offers clear map and text views. The app is a great solution for international visitors to the city who have data roaming turned off.