Only the current version so far — new entries appear as the app ships updates.
보이는 서울 지하철 - 실시간 열차 도착정보 is a maps & navigation app by dwjh.factory with 10,000+ downloads (about 35K estimated). +43 installs in the last 7 days. Released Feb 6, 2020. Install growth, rank history, SDKs and ad networks.
From the store listing: “This app collects and utilizes real-time train arrivals, location information, timetables, and historical information of Seoul Open Data Plaza.
Main Features Introduction
1. Search real-time train arrival information for each subway station up to 5 up/down lines
2. Real-time train location information inquiry of 16…”