Based on the user reviews on the Apple App Store, here are three cons and pros of the Lexicon Delta app, each limited to 15 words: **Pros:** 1. Users praised the app's effectiveness in improving vocabulary and language skills with engaging exercises. 2. Reviews highlighted the app's high-quality audio and video content, enhancing learning experience. 3. Many users commended the app's user-friendly interface, making learning a breeze. **Cons:** 1. Some users reported issues with app crashes and freezing, disrupting learning flow. 2. Reviews criticized the app's limited offline access, requiring constant internet connection. 3. A few users found the app's navigation and organization confusing, leading to frustration. Note: These points are based on a general analysis of the user reviews and may not reflect the experiences of every user.