Transport
Any tip for using Kakao T (taxi app) as a foreigner?
It works fine for foreigners: sign up with your Korean number, and if the app rejects your overseas card, just set payment to "pay in car" and use your card with the driver. Your destination is set in the app, so zero Korean needed. Blue (venti/blue) taxis are fixed-price. Uber (UT app) also runs in Seoul as a backup.