If you're looking for an app to help you learn Japanese vocabulary and grammar, look no further than "từ vựng ngữ pháp jlpt n3 n2 n1" by HNteam. This free app is available on Android and offers a wide range of features to help you learn and practice Japanese.

The app includes a comprehensive collection of vocabulary and grammar for JLPT N1, N2, and N3, with kanji, hiragana, katakana, and Vietnamese translations. You can use the flashcard feature to study and save words, as well as create your own vocabulary lists. The app also offers listening exercises to help you improve your listening skills.

One of the standout features of this app is the ability to create a personalized vocabulary notebook to keep track of words you haven't yet learned or have trouble remembering. Additionally, the app includes grammar exercises to help you prepare for the JLPT N3, N2, and N1 exams.

Overall, "từ vựng ngữ pháp jlpt n3 n2 n1" is a useful tool for anyone looking to improve their Japanese language skills, with a wide range of features and a user-friendly interface.