Based on the user reviews on the App Store, here are three Cons and Pros of the "Infinite Russian" app: **Cons:** 1. Limited vocabulary database: Some users find the vocabulary selection to be limited, making it less effective for learning. 2. No audio pronunciation: The app lacks audio pronunciation guides, making it difficult for learners to improve their accent. 3. Incomplete sentence examples: Some users complain that sentence examples are incomplete or incorrect, confusing learners. **Pros:** 1. Engaging gamification: Users praise the app's gamification features, which make learning Russian fun and addictive. 2. Portable and easy to use: The app is designed for easy access and use on-the-go, making it convenient for learners. 3. Progress tracking: Users appreciate the app's ability to track progress and provide personalized feedback and improvement suggestions.