Based on the user reviews on the App Store, here are three cons and pros for the Ukulele String Tuner app: **Cons:** 1. Some users find the app's tunings not accurate or inconsistent, causing frustration. 2. A few users complain about the app's UI being cluttered or hard to navigate. 3. A few users experienced crashes or freeze-ups during usage, leading to lost progress. **Pros:** 1. Most users praise the app's ease of use and intuitive interface for beginners and pros alike. 2. Users appreciate the app's fast and accurate tunings, making it a reliable tool for performances. 3. Users commended the app's high-quality sound and realistic string tones, enhancing their overall playing experience. Note: The number of users who experienced these cons and pros may vary, but I've summarized the general feedback from the reviews.