Toilocator is the quickest simplest way of
finding a public toilet or bathroom or restroom. It uses your
phone's GPS to find nearby public conveniences around the world
that are public(government build) free and those that offer
disabled access. Alternatively on clicking the directions button it
will navigate the user to the nearest toilet without the need to
search. It's free no in-app purchases and has over 290000+ toilets
in its database.