옛날 달력 - 큰 글씨 음력 달력 is a productivity app by oldcalendar with 10+ downloads (about 13 estimated). Released Oct 27, 2026. Install growth, rank history, SDKs and ad networks.
From the store listing: “A calendar with the feel of an old-fashioned daily calendar, displaying the lunar calendar, seasons, and holidays in large font. It fits perfectly on parents' mobile phones.”