Based on the users' reviews, here are three cons and pros for the Koi Aquarium app: **Pros:** 1. "Visually stunning and realistic aquarium simulations engage me daily." 2. "Gentle, soothing sounds and calming music enhance relaxation." 3. "Easy to customize tank settings, decorations, and aquatic life variety." **Cons:** 1. "Occasional crashes and force closures disrupt my peaceful experience." 2. "Limited editing options for customizing tank appearance and features." 3. "No option to share or export my custom aquarium creations."