Subway Korea
The best and easiest way to move around cities in Korea is by subway. Although there are many buses, they are typically trickier and more challenging to transfer between than the subway. You can get pretty much anywhere, especially in Seoul, one of the cities with the best subway system.
The free app Subway Korea, which supports the English version, must be downloaded. You can benefit from bookmarks for frequently used routes and stations, real-time transit information, and more.
This app not only provides information on Seoul but also on other significant cities with subway systems, including Busan, Daegu, Gwangju, and Daejeon.
Website: NA
Download iOS: https://apps.apple.com/us/app/subway-korea/id325924444
Download Android: https://play.google.com/store/apps/details?gl=US&hl=en&id=com.imagedrome.jihachul