Only the current version so far — new entries appear as the app ships updates.
첫한달 - 출생신고 기한·과태료 달력 is a video players & editors app by 엑스노 with 1+ downloads (about 1 estimated). Released Dec 19, 2020. Install growth, rank history, SDKs and ad networks.
From the store listing: “Just enter the baby's birth date to use a flag calendar for the 1-month birth registration and 60-day child allowance deadlines, plus notifications 7 and 1 day in advance.”