JLPT Practice N1 - N5 is an Android app that offers a variety of quiz questions about Grammar, Vocabulary, and Kanji to help users improve their Japanese language skills. The app is developed by Bùi Xuân Hiếu and is completely free to use.

The app offers five different levels to choose from, ranging from N1 to N5, and users can select the type of question they want to practice. Once the quiz is completed, users can share their test results on Facebook. The app is user-friendly and provides a comprehensive learning experience for anyone interested in learning Japanese.

Overall, JLPT Practice N1 - N5 is a great app for those who want to improve their Japanese language skills. It's easy to use, has a wide range of quiz questions, and is completely free. The app is highly recommended for anyone who wants to learn Japanese or prepare for the Japanese Language Proficiency Test (JLPT).