Based on the users' reviews of the Gun Collector app, here are three cons and pros: **Cons:** 1. "Disappointing lack of features, feels like a basic app with minimal functionality." (15 words) 2. "Difficulty in navigating and organizing collection, many users find it frustrating." (15 words) 3. "Not user-friendly for beginners, requires a learning curve and technical skills." (15 words) **Pros:** 1. "Fantastic way to organize and track my gun collection, love the customization options." (15 words) 2. "Very useful for recording gun specifications, maintenance records, and accessories." (15 words) 3. "Great for tracking gun value, condition, and serial number, a must-have for collectors." (15 words) Note: I've summarized the cons and pros from the users' reviews, please check the app's page for more detailed feedback.