Recently in speaking with a tech-savvy senior citizen who happened to own an iPhone, I was shown an app that I thought to be rather clever. Have2P, available for both iPhone and Android, uses your location to find the nearest places that contain a restroom. This app is not only useful for senior citizens, who tend to use the bathroom more than younger folk, but for people that travel or take road trips. The app is made by YellowPages, so it simply operates by scanning YellowPages listings for nearby locations. You can even rate restrooms and leave comments about the facilities for those that are discerning about where they do their business.