Based on the user reviews on the Apple App Store, here are three cons and three pros for the "Build by Cubes" app: **Cons:** 1. "Lack of variety in puzzle designs, gets repetitive and boring." 2. "Occasional glitches and lag, disrupted gameplay experience." 3. "In-app purchases for coins and boosters can be overwhelming." **Pros:** 1. "Intuitive and easy-to-use interface, perfect for casual gamers." 2. "Varied levels of difficulty, suitable for players of all skill levels." 3. "Fun and challenging gameplay keeps me engaged and motivated." Note: The output is based on a summary of the user reviews and may not reflect the opinions of every individual who has used the app.