Based on the users' reviews of the "StackyMath" app, here are three cons and pros in English, with 15 words limited for each item: **Cons:** 1. Users find the app too easy, not challenging enough for their math skills. 2. Some users experience lag and slow performance, causing frustration. 3. Limited customizability options for game settings and difficulty levels. **Pros:** 1. Users appreciate the app's unique and engaging stack-based gameplay. 2. Positive reviews praise the app's ability to improve math skills and confidence. 3. Users like the app's colorful and fun graphics, making learning fun. Please note that these are based on a general analysis of the reviews and might not reflect the exact opinions of every user.