It contains idioms/proverbs/aphorisms that are essential for conversation and reading comprehension.All sentences and audio files are provided, and repeated practice is possible through listening/speaking/writing/quiz.It is structured so that you can memorize all sentences naturally.※ Checklist for speech audio error1. Make sure Audio Permissions are enabled2. Check if the Google app is installed on the device3. Check if Google app, Google apps own audio (microphone) permission is activated[Access right to use the app]⦿ RECORD_AUDIO - Requires permission for voice recognition.[A word from the developer]To provide quality content and maintain the serverThis app inevitably contains a number of advertisements.Customers who are uncomfortable with advertisement exposurePlease purchase a paid app.No data is exchanged between paid and free apps