This app was mentioned in 1 comment, with an average of 1.00 upvote
If you can manage to translate written korean to english, then one of theses will work.
https://play.google.com/store/apps/details?id=com.sampleapp
https://play.google.com/store/apps/details?id=com.fineapp.yogiyo
https://play.google.com/store/apps/details?id=stonykids.baedaltong.season2
these are most familiar apps for ordering a delivery food.