공인중개사중개사법령 및 중개실무 OX퀴즈 is an Android app that helps users study for the second real estate broker exam in Korea through an OX quiz format. This app allows users to study the complex laws and regulations related to real estate brokerage in a fun and interactive way. The app offers a variety of features such as a collection of previous exam questions, a note-taking function to record incorrect answers, the ability to customize the number of questions, the option to submit new questions, and links to video lectures. Users can also view statistics on their performance and compare their results with other users. The app is free to use, but users can purchase an in-app upgrade to unlock unlimited questions and remove ads.