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 error
1. Make sure Audio Permissions are enabled
2. Check if the Google app is installed on the device
3. Check if Google app, Google app's own audio (microphone) permission is activated

[Access right to use the app]
⦿ RECORD_AUDIO - Requires permission for voice recognition.

[A word from the developer]
Paid apps have ads removed and can be used offline (except for some features).
No data is exchanged between paid and free apps

For customers who are burdened with paid apps,
Please use the free app.

To provide quality content and maintain the server
Free apps inevitably contain a lot of ads.