Based on the user reviews of the app " combines big data and blockchain technology" on the Apple App Store, here are three pros and three cons in English, with 15 words limit for each item: **Pros:** 1. User-friendly interface makes data analysis and tracking simple and intuitive. 2. Real-time data updates provide timely insights and accurate tracking. 3. Secure blockchain technology ensures data integrity and transparency. **Cons:** 1. Limited features and functionalities for advanced users. 2. Technical issues and glitches sometimes hinder performance and stability. 3. Complex underlying concepts may overwhelm novice users.