Based on the users' reviews, here are three cons and pros of the app: **Cons:** 1. "Poor sound quality, not realistic, and gets annoying after a while." (User review) 2. "Lack of customization options, limited sound effects, and no recording feature." (User review) 3. "In-app purchases are misleading, with no clear information on what's included." (User review) **Pros:** 1. "Easy to use, intuitive interface, and great for stress relief or focus." (User review) 2. "Wide range of sound effects, from realistic to creative, keeps me engaged." (User review) 3. "Portability and accessibility, can use anywhere, anytime, without internet." (User review) Please note that these are based on a selection of user reviews and may not represent the overall opinion of all users.