Not bad. – Tokyo Metro Subway Map Review

By no means comprehensive, it doesn't include certain train lines. So a few times, not knowing this, it really tripped me up. After I got more used to the metro, this app was fine for most of my trips. It's layout is simple and very easy to read. But at the end of the day, Google Maps' directions were the best I saw while in Tokyo. I downloaded 3 metro apps and Google Maps is better than all of them.
Review by ChaunceyDos on Tokyo Metro Subway Map.