I was made for the civil servants and those who are preparing for the exam (Korean History Capability Test) and those studying Korean history.Basic learning has basic books and problem papers, but it can help you organize contents by solving simple problems from time to time.1. Good thing to use this app- You can improve your skills simply by using the time of the jarring.- You can learn more deeply through many pictures and links.- Through the statistical processing by unit, it is possible to know the member who is lacking.- It helps to learn through EBS video lecture link.2. What you can do with this app- You can solve a lot of views and basics of the problem in OX quiz format.- There is a wrong answer function that you can collect and solve only the problems that are very toxic among your problems.- You can also set up problems that are too easy to solve (manual, automatic)- You can type in the problem so others can solve it.- Video lectures are linked.- Shows statistics about the problem (all users, my grades).3. In-app purchases- Out of the limit of 50 questions per day, you can solve unlimited problems per day.- The bottom ad and interstitial disappear.