Delhi Metro Fare Calculator and Auto-Updating Map

Main Features:
Calculate the fare between any two stations!
This app includes zoomable diagram for the Delhi Metro
Maps work underground even if there is no connection to the internet!
The maps will automatically update when a newer map is avaiable (requires network connection).
The maps are given the entire screen! We dont use tabbed views and other navigation mechanisms that take up valuable real estate. A costom slide-out menu design is used.
Smooth scrolling and zooming

Other features:
Pinch to zoom in and out
Double-tap to zoom in by a factor of 2
At full zoom, double-tap to zoom out by a factor of 8
The map initially opens at an optimal position
When the map is seen in its entirety by fully zooming out, the full view is preserved under orientation changes.