--- title: "Koi - Aquarium — App Overview" url: https://marlvel.ai/intel-report/games/koi-aquarium category: Games developer: HAREPPO platforms: ios rating: 4.2 (33 ratings) pricing: freemium report_level: overview generated: 2026-05-09 --- > **Key Insight:** This is a minimalist, ad-supported aquarium simulation centered on passive observation and simple interaction mechanics. | Metric | Value | |--------|-------| | Category | Games | | Rating | 4.2 ★ (33) | | Pricing | freemium | | Platforms | iOS | | Latest Version (iOS) | 1.0.4 | | Developer | HAREPPO | ## What is Koi - Aquarium? Koi - Aquarium is a casual simulation game by HAREPPO that allows users to observe carp and goldfish in a virtual environment. The app focuses on a low-stress experience where players can adjust their viewing angles and interact with the fish to increase favorability. ## Key Features - **Observation Mode**: Users can move their point of view to observe carp and goldfish from various angles. - **Favorability System**: Players tap on fish to increase their favorability, which can be exchanged for in-game currency. - **In-Game Shop**: Users can purchase additional carp and goldfish using diamonds earned through gameplay or advertisements. - **Mini-games**: Players can participate in mini-games to earn diamonds for use in the shop. ## Who is it for? Casual gamers interested in low-intensity, aesthetic-focused virtual pet simulations. ## Links - [App Store](https://apps.apple.com/us/app/koi-aquarium/id1558420605?uo=4) - [Full Intelligence Report](https://marlvel.ai/intel-report/games/koi-aquarium) --- *This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/intel-report/games/koi-aquarium).* *Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*