Based on the user reviews, here are three pros and three cons of the app: **Pros:** 1. Users praise the app's ability to help them learn Japanese effectively, with many reporting improved language skills. 2. The app's gamification features are popular, making learning more engaging and fun for users. 3. Many reviewers appreciate the app's comprehensive lessons, covering various levels and topics. **Cons:** 1. Some users experience technical issues, such as crashes and app freezing, which can be frustrating. 2. A few reviewers find the app's navigation and interface confusing, making it difficult to use. 3. Some users feel that the app's grammar lessons are too basic or lack advanced concepts, limiting its usefulness. Note: The user reviews are in Japanese, so I tried to summarize the main points and themes in English.