The Etiquette App The consummate host keeps his or her guests feeling welcome and comfortable, according to party planner extraordinaire, Emily Post. With The Etiquette App, acting hospitable and polite to coworkers, family, friends and strangers can be easy. This app provides users with basic instructions for suitable manners, protocols and customs under different circumstances. Perhaps the most entertaining feature of The Etiquette App is the sharing option which allows users to anonymously, and not so subtly, send etiquette tips to Facebook friends or Twitter followers. This 99 cent app is compatible with iPhone, iPod touch, and iPad, but requires iOS 4.0 or later.