PORO - Japanese Grammar is an educational app designed to assist Japanese learners with grammar activities at various proficiency levels. With 700+ grammar points divided into Beginner, Elementary, Intermediate, and Advanced levels, the app caters to learners from JLPT N5 to JLPT N1. It provides detailed explanations and examples to enhance grammar skills and offers 1300+ interactive quizzes, including 100 quizzes simulating JLPT tests.

The app's main features include comprehensive grammar points coverage, interactive quizzes for practice and testing, and detailed reviews with explanations of correct answers. It aims to improve communication and writing skills for learners of all levels, making it a valuable tool for those interested in Japanese language and culture.