Key features IOS Android - Authorization - Registration social or base - View/edit own profile - View all tests - Add test to profile - View statistics by tests - Pass some test. View result by test. Pass again the test(only not right answers) - Pass some demo tes - Buy the test Backend/Web - System for users and roles management - Functionality for managing tests (creating, editing, importing from files) - Mechanism which allows to manage access to tests. - System for management test owners. - Test catalogue (displaying, search, filtering by different parameters including key words and tags) - Statistics which allow you to track your progress