CityMyth is a gamified AR city tour guide app that aims at reinvigorating the travel industry during and after the pandemic. Different from other travel apps, CityMyth integrates customized itinerary, AR experience, and scripted game（劇本殺）to familiarize travelers with the stories behind the city and add more amusement. Our product fits the needs of several user categories under the current situation of travel restrictions. For city dwellers, they can have a deeper understanding of their own city culture and history, while having an innovative form of entertainment. For travelers, they can utilize their limited travel time more efficiently and have more engagement during the trip. Regarding technology, we make use of Augmented Reality, Bluetooth Low Energy indoor positioning to realize our features. Our product is an unprecedented combination of these elements, so we believe a fad can be foreseen.