Company Doyoung Gwak created these great apps:
Easi Calc for free, E_Calc, Guitar Kit+ for Chord Search, Save and Training, 한글시계, Dri-Viewer, E Widget Calc, 공지 알림 서비스 for PNU CSE, Easi Calc pro, Roast Meister, Music Tictoc, JUST POINT IT, 공감 - 공간에 감성을 더하다, 뭐먹을지 정해줌, Golf Swing Clipper, Just Timer for LeetCode, and others..
