Whether you live in are visiting Paris, France, Ma RATP dans la poche Provides all passenger information on the RATP networks on your iPhone or iPod touch. With real time traffic reports, transit routes, arrival time for the next bus, tram, RER, night bus, airport bus. Also find interval times for Metro and first and last metro.
Tramways are operated in Paris by its public transport authority, RATP, which also operates the Paris Métro and most bus services. The city currently has four lines and is planning an additional one.
You must be using an iPhone to see the iPhone version of this app. Try it here
This doesn’t seem to be an app but an iphone adapted part of their website. There is quite a difference between the two