YBM인강 - 수강전용 앱

★ Information on the course you are taking at a glance! ★ I collect only the content I am interested in! ★ Lecture schedule is up to you! ★ You can learn for free even if you don't have a lecture! ★ Easily search for the lecture you want to find by language! ▣ Easy to take lectures When you run the