Airpnp shows you where's there's a nearby toilet, at someone's home or even office.
It's not necessarily free, some charge $5 for a flush.
There are already plenty of apps that can point you in the direction of a free restroom that's open to the public, but Airpnp broadens the scope.
So far only four people in New York City are offering up their commode. Others are poo pooing the communal potty.
For more information please visit: http://www.airpnp.co/