Based on the users' reviews, here are three cons and pros for the NL escort language learning app: **Cons:** 1. **Limited vocabulary**: Some users find the vocabulary selection limited, making it less effective for learning new words. 2. **Poor audio quality**: A few reviewers mentioned poor audio quality, making it difficult to understand spoken phrases. 3. **Lack of grammar explanations**: Some users found the app lacking in grammar explanations, making it hard to understand sentence structures. **Pros:** 1. **Effective flashcards**: Many users praised the app's flashcard feature, finding it helpful for memorizing new words and phrases. 2. **Simple and intuitive interface**: Reviewers appreciated the app's user-friendly design, making it easy to navigate and use. 3. **Convenient language practice**: Users liked the app's portability and ability to practice language skills on-the-go.