Since Euljiro, an industrial, commercial district in Seoul, has not been developed since the mid 1900s, it appears dark and run-down. The app designers want to change the old negative images and increase the accessibility to this district. The app not only provides general location information, it also provides up-to-date information optimized for unique cases based on special geographical characteristics. Representative functions include the Euljiro Optimized Dictionary & Map, AR navigation, and Review System.