Based on the users' reviews of the "Stack Crusher" app, here are three cons and pros in English, limited to 15 words each: **Cons:** 1. "Crashes frequently and requires constant restarts, frustrating and annoying experience overall." 2. "Limited customization options and settings, can't tailor the app to individual preferences." 3. "Some users report inaccuracies in the calculations and lack of detailed explanations." **Pros:** 1. "Efficient and intuitive interface makes it easy to use and navigate, great for beginners and pros." 2. "Accurate calculations and helpful hints for solving puzzles, boosts confidence and learning." 3. "Sense of accomplishment and motivation boost from completing levels and achieving goals."