Based on the users' reviews on the Apple App Store, here are the conclusions: **Pros:** 1. **Effective learning tool**: Users found the app's interactive lessons and quizzes helpful for improving their Japanese language skills. 2. **Customizable learning**: Many users praised the app's ability to adjust to their learning pace and focus on specific areas of improvement. 3. **Motivating progress tracking**: The app's tracking feature encouraged users to continue learning, as they could see their progress and achievements. **Cons:** 1. **Limited vocabulary**: Some users felt that the app's vocabulary offerings were limited and not sufficient for advanced learners. 2. **Occasional errors**: A few users reported encountering errors or bugs within the app, which made it frustrating to use. 3. **No offline access**: The inability to access the app without an internet connection was a drawback for users who wanted to learn on-the-go.