What is TestBook? Testbook.az has a goal of benefiting more people who have access to mobile tests. We offer a convenient way for anyone to test the samples, increase their knowledge, and aim to reduce the money spent on the most important tests. The app includes more than 40,000 test questions available in our database for students and applicants, and residents can access them as well as curriculum information. Teachers can use our test questions to screen students for knowledge in various subjects, and we hope that this will help students and applicants save money on important tests. The application has many different sections, including English, Azerbaijani history, geography, the SSAC, Biology, Azerbaijani language, teachers, diagnostic assessment, date, driver's license exam, literature, logic (logic), Physics, Informatics, Algebra, Geometry, Chemistry, YOS, magistrates, and interesting questions.