Good luck with that. I don't schedule my bathroom breaks in advance down to five minutes, don't know anyone who does unless they are in jail or assisted living

Good luck with that. I don't schedule my bathroom breaks in advance down to five minutes, don't know anyone who does unless they are in jail or assisted living or work at an Amazon warehouse. Seems unworkable in the kinds of situations where someone desperately needs a bathroom, like dealing with children who give just minutes of warning, if that. Supposing I did have a map of possibly available restrooms, I would just go to the nearest one and offer to pay some token amount to use it, bypassing the app. As an adult I have learned where I might ask to use a toilet with reasonable possibility of success, and almost never have to pay for that. Some years ago a similar idea got floated on some digital nomad forum. The big selling point was finding available toilets when you can't speak the language. That never took off to my knowledge, because learning how to ask someone in a foreign language -- or just doing the universal pantomime for "I have to pee" -- is simpler than using an app.