Great app! Would love to see an option to view the map as it is or as an offline scale map of Seoul (instead of using Google Maps, though that is awesome as a feature when a data connection is available). When traveling to Seoul, I turn off my roaming data connection on my phone so it would be great to view relative station positioning offline.
The current map is like the ones used in the subways (which is great) but sometimes misleading. For example, Sinnonhyeon looks so be so far from Gangnam when it is really only a 5-10 minute walk between stations.
Im not criticizing the app because it is the best of the Seoul Metro apps but I hope you look into my suggestion!
...David about Seoul City Metro - Seoul, South Korean Subway Guide, v1.2