ЕГЭ Обществознание 2021 - Полиграф is an Android application developed by Helicoid Team that offers more than 5000 tasks to prepare for the Russian State Exam in Social Studies. The app allows you to take tests to improve your skills and get 100 points. You can choose to take a random test or tests based on question types, such as single-answer, multiple-answer, matching, selecting general concepts, and questions with diagrams. Additionally, you can choose to take tests based on topics from the social studies course, such as economics, law, politics, social relations, and human society.

The app keeps track of your progress and shows statistics to help you improve and reduce the number of mistakes. All questions are randomly generated and do not repeat themselves. The app also saves a history of solved questions. The app is free and features only one advertisement after each test, making it user-friendly. The simple and concise interface makes it easy to use, and the app's small size ensures fast download and installation. However, it is important to note that the developer's contact information is not available on the app.