Based on the users' reviews of the Guitar Flash Chords app, here are three cons and pros in English, limited to 15 words each: **Cons:** 1. Some users found the app's user interface cluttered and overwhelming, making it difficult to navigate. 2. A few reviewers noted that the app's chord charts could be more detailed and accurate, leading to mistakes. 3. Some users experienced crashes and bugs, which frustrated them and interrupted their learning process. **Pros:** 1. Many reviewers praised the app's comprehensive and organized library of chords, making it easy to learn. 2. Users appreciated the app's interactive features, such as the ability to play along with songs. 3. Several reviewers noted that the app helped them improve their guitar skills and build confidence in their playing.