Helpful, but check your routes
We downloaded this app when we arrived in Paris two weeks ago. Prior to yesterday, we would have given it a solid five-star rating. However, yesterday, in planning a trip to the Musee dOrsay, it recommended a simple route using RER routes B & C. When we got off the B train, we found that the C line was closed. As far as I can tell, at least this portion of the C line has been closed since the middle of July and will continue to be closed until the 28th of August. The app is great, but doesnt appear to keep current on route and station closures, of which there are many.
ErinsRob about
Paris Metro Map and Routes, v2.1.5