Based on the user reviews of the app "Keyboard Masters" on Apple's App Store, here are three cons and pros, each limited to 15 words: **Pros:** 1. Users praise the app's ease of use, saying it's "intuitive" and "simple" to navigate. 2. Reviewers appreciate the variety of themes, fonts, and customization options available. 3. Many users appreciate the app's ability to improve their typing speed and accuracy. **Cons:** 1. Some users find the app's ads annoying and distracting, calling them "intrusive" and "obtrusive". 2. Reviewers express frustration with the app's occasional crashes and glitches. 3. A few users note that the app's keyboard layout is not customizable enough for their liking. Please note that these points are based on a summary of user reviews and may not reflect the opinions of all users.