The app has also incorporated Metropolitan Transportation Authority (MTA)'s neighborhood map to make a continuous, transit-oriented map of Manhattan. This is good, because the maps are too big to print, and may not be that useful for someone who is not already familiar with NYC. The app also includes bus maps.
ExitStrategyNYC for the iPhone gives information for all of New York City. A smaller version of this app is also available for BlackBerry and Android phones and also works on Amazon's Kindle. The lite version does not have subway or bus maps and Manhattan is the only borough with full coverage. The iPhone version costs $4.99. The lite versions cost from $3.99 to $0.99 depending on the platform you buy it for.
I have sent the company a message asking if this app is useful for handicapped riders who need to be use elevators or ramps. (Update: the app includes the location of elevators.)
Now someone needs to make something like this for the Seoul subway. Also, something to tell riders which escalators and elevators are not working in the DC metro.