全国地下鉄ナビ is a free navigation app that collaborates with subway operators nationwide. It provides easy access to subway route maps, operating information, timetables, fare tables, station layouts, and nearby spot information for cities like Sapporo, Sendai, Tokyo, Yokohama, Nagoya, Kyoto, Osaka, Kobe, and Fukuoka. With features like history and favorites, this app ensures quick access to subway information across Japan. Users can also explore station surroundings and find special offers. The app is certified by AndroLib as a developer of safe and secure applications.

The app's key features include customizable subway route maps, real-time operating information, spot information near stations, timetables, fare details, station layouts, transfer guidance, boarding position information, local bus and tram details, disaster prevention maps (limited to Tokyo), history, favorites, and event information for various regions.