After analyzing the user reviews, here are three cons and pros in English, each limited to 15 words: **Pros:** 1. Many users praise the app's clarity and ease of use, stating it's "well-designed" and "user-friendly". 2. Users appreciate the app's functionality, saying it helps them manage their tank maintenance and water testing "effectively". 3. Some users mention that the app's tank log feature is "helpful" for tracking progress and maintaining a clean tank. **Cons:** 1. A common complaint is that the app lacks a built-in database for tank compatibility, making it "incomplete". 2. Some users find the app's ads to be "annoying" and "distracting", ruining the overall user experience. 3. Several reviewers criticize the app's lack of offline access, saying it's "unusable" without an internet connection. Please note that these are general conclusions based on the reviews and might not reflect the opinions of all users.