ImprovementLess waiting after answering quiz questions
Themed quizzes now show whether you were right instantly, and explanation ranges load in advance.
Themed quizzes no longer wait for the server to grade each answer. In all quizzes, the explanation range starts loading as soon as your answer is graded, and the final question's completion starts saving early, so you can move on right after tapping "Done". The difference is biggest for people outside Japan.