This app was mentioned in 1 comment, with an average of 12.00 upvotes
What is with these news portals? They won't even drop the app name, and they don't even linkify their links. Found it on the Korean news, and even they only dropped the app name in passing. I think this is it :
Android: 서울둘레길 https://play.google.com/store/apps/details?id=kr.go.seoul.seoultrail
Can't seem to find it for iphones through Google.