JLPT N4 - Luyện Thi N4 (ngữ pháp, kanji, từ vựng) is an Android application developed by Learning English Free for those who want to learn Japanese with N4 and N5 proficiency levels. The app offers a variety of features to help users improve their Japanese language skills, including listening and reading comprehension exercises, vocabulary and kanji training, grammar lessons, and online N4 grammar tests.

In addition to these features, the app provides offline access to N4 grammar lessons, examples of grammar usage, and a feature for combining multiple grammar concepts in a single sentence. JLPT N4 - Luyện Thi N4 (ngữ pháp, kanji, từ vựng) also includes data-rich content that is completely free of charge and supports multiple languages. Users can access a complete set of Japanese language proficiency tests and links to other apps for learning vocabulary, kanji, grammar, listening, and reading comprehension.