Based on the user reviews of the "Block Fans" app, here are three cons and pros in 15 words or less: **Cons:** 1. Multiple users have reported that the app is not effective in blocking unwanted fans. 2. Some reviewers mentioned that the app is not user-friendly or intuitive to use. 3. Several users have experienced issues with the app's functionality crashing or freezing. **Pros:** 1. Many users have found the app to be effective in blocking unwanted comments and followers. 2. Reviewers praise the app's ease of use and simple navigation features. 3. Several users have appreciated the app's features for blocking specific keywords and phrases.