# Rice Fish vs Koi

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.

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.

## The numbers

| Metric | Rice Fish | Koi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (14 ratings)](https://appshunter.io/ios/app/rice-fish/id1069343386/reviews)** | [4.3 (36 ratings)](https://appshunter.io/ios/app/koi-aquarium/id1558420605/reviews) |
| Number of ratings | 14 | **36** |
| Positive reviews | **66.7% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 4 months** | Every 20 months |
| Monetization | Ad-supported | Ad-supported |
| Size | 28 MB | 126 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [KENSHI DOI](https://appshunter.io/developer/709264908) | [HAREPPO](https://appshunter.io/developer/604325074) |

## What reviewers say

### Rice Fish

[App page](https://appshunter.io/ios/app/rice-fish/id1069343386)

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.

**Highlights:** Virtual aquarium simulation, Feed and clean fish, Interactive characters, Aquarium customization, iCloud data saving, 3D VR view companion app

**Features:** macOS Compatibility

**In-app purchases:** none


### Koi

[App page](https://appshunter.io/ios/app/koi-aquarium/id1558420605)

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.

**Highlights:** Observe koi and goldfish, Change viewing angles, Increase fish favorability, Purchase fish with in-game currency, Earn currency via mini-games and ads

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Rice Fish free?

Rice Fish is free to download, with no in-app purchases.

### Is Koi free?

Koi is free to download, with no in-app purchases.

### Which has better reviews, Rice Fish or Koi?

Rice Fish is rated higher. Rice Fish averages 4.4 out of 5 from 14 ratings, while Koi averages 4.3 from 36 ratings.

### Do Rice Fish or Koi have ads?

Both Rice Fish and Koi show ads.

### Which is updated more often, Rice Fish or Koi?

Rice Fish ships an update every 4 months, and Koi every 20 months. Most recently, Rice Fish was updated on October 24, 2026 and Koi on October 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*