Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
해시계는 태양의 위치를 이용하여 시간을 측정합니다.haesigye-neun taeyang-ui wichi-reul iyonghayeo sigan-eul cheugjeonghamnida.A sundial measures time using the position of the sun.