Based on the user reviews, here are three pros and three cons of the Rainbow Sort app: Pros: * Users rave about the app's unique color-sorting mechanism, citing "easy to use" and "intuitive design". * Many reviewers praise the app's ability to "calm stress" and "relax minds" with its soothing color-sorting process. * Some users appreciate the app's customization options, allowing them to "personalize" and "make it my own". Cons: * Some users find the app's difficulty curve "steep" and "frustrating", especially for those new to sorting games. * A few reviewers criticize the app's lack of "game-like features" and "level progression", making it feel "boring" and "static". * Some users express disappointment with the app's "limited" content and "repetitive" gameplay, wishing for more "variety" and "new features".