檸檬樹-大家學標準日本語中級本 is an educational app developed by Soyong Corporation. Designed for learners who want to study Japanese, this app provides a comprehensive guide to learning the language correctly and progressively.

With the guidance of the author, Ikko Deguchi, the app focuses on mastering essential grammar patterns and conversations at an intermediate level. It covers topics such as verb conjugation and using the te-form in various contexts.

The app offers a range of features to enhance learning, including vocabulary training with flashcards and quizzes, reading exercises with the option to display or hide the Japanese and Chinese translations, and a search function to easily find specific content. Additionally, users can bookmark important learning materials for future review.

Overall, 檸檬樹-大家學標準日本語中級本 provides a comprehensive and structured approach to learning Japanese, making it an ideal tool for intermediate learners.