Master mode is suitable for repetitive learning, and normal mode is suitable for tests and exams.
Master mode is intended for repeated learning and review, and the completion rate is displayed on the start screen, and learning is started from the "Start" button, "Retry failed quizzes," and "Review mode" button.
Normal mode is recommended for one-time tests and tests.
In normal mode, only the "Start" button is displayed on the start screen.
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