Rice Fish vs Koi
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Rice Fish
A virtual aquarium simulation where you care for Japanese rice fishes and aquatic plants. Interact with your fish, clean the tank, and watch your aquarium grow. Save your progress via iCloud and explore a 3D view with a companion app.
- Virtual aquarium simulation
- Feed and clean fish
- Interactive characters
- Aquarium customization
- iCloud data saving
- 3D VR view companion app
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Rice Fish is an aquarium app of Japanese rice fishes. Operations: Feeding: Tap water surface. Cleaning: Swipe dirty glass surface. Touch: Each character reacts your touch. You can change layout of your aquarium by pushing root of weeds. Menu: Long tap and help menu will appear. Growing: Characters will grow if you do cleaning/feeding once or twice a day. Characters: There are 4 kinds of characters. Rice Fish: Do both cleaning and feeding. Weed: Do only cleaning. Grow by touching. Snail: Does not do cleaning. This app saves play data to iCloud every two minutes. You can download play data when you install this app to new device. You can also view your own aquarium in 3D by "Rice Fish VR" app.
Koi
Observe and interact with beautiful koi and goldfish in a virtual aquarium. Increase their favorability, collect more fish, and unlock new views. Enjoy a relaxing experience with optional in-game currency for faster progression.
- Observe koi and goldfish
- Change viewing angles
- Increase fish favorability
- Purchase fish with in-game currency
- Earn currency via mini-games and ads
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* How to play There are no difficult elements, basically you just look at the beautiful carp and goldfish. Move your point of view and observe the carp and goldfish from various angles. * How to increase carp and goldfish? Tap to increase the favorability of carp and goldfish, and you can also purchase the number of carp and goldfish by exchanging favorability for diamonds (in-game currency) at the shop. You can also get diamonds by watching mini games and advertisements, so please use it.
Screenshots
Verdict
Rice Fish and Koi both sit at 4.4 stars, but that hides the real split: 67% of Rice Fish's written reviews are positive against 33% of Koi's. Rice Fish also leads on update cadence (every 4 months vs every 20 months). On price, rating, ratings volume and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.4 for Rice Fish against 4.3 for Koi. Both are backed by a comparable volume of ratings — 14 and 36 respectively. Written reviews are what separate them: 67% of Rice Fish's written reviews are positive against 33% of Koi's.
Rice Fish ships an update every 4 months, Koi every 20 months. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.
| Parameter | Rice Fish | Koi |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (14 ratings) — better | 4.3 (36 ratings) |
| Positive reviews | 66.7% of reviews — better | 33.3% of reviews |
| Number of ratings | 14 | 36 — better |
| Update frequency | Every 4 months — better | Every 20 months |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 28 MB | 126 MB |
| Age rating | 4+ | 12+ |
| Developer | KENSHI DOI | HAREPPO |
Customer experience
Rice Fish
Koi
In-app purchases
Rice Fish
No in-app purchases
Koi
No in-app purchases
