Inaccurate
This map is missing entire lines (e.g. lines 1 and 5) and stations (Bastille, La Défense, etc.). I made the mistake of downloading this before a trip to Paris, assuming it was reasonably accurate, and had a few moments of confusion before I realized that it was due to this app, not me being a confused tourist.
vaguepast about
Paris Transport Map - Metro Map and Route Planner, v1.0.3