Rice Fish vs Medaka Breeder
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.
Medaka Breeder
Experience realistic fish keeping by feeding and cleaning your virtual fish. Watch them grow, breed, and inherit traits from their parents. Customize aquariums and collect various fish species.
- Realistic killifish keeping simulation
- Breed fish and inherit traits
- Customize aquariums with decorations
- Collect over 46 types of killifish
- Missions and rewards system
- Observation and shooting modes
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[Game Features] You can experience realistic killifish keeping in your phone. Taking care of your killifish is very easy: just feed them once every three days and clean the tank. The killifish will eventually grow over time and breed with other adult killifish (2cm or larger). The killifish born from the breeding will inherit the characteristics of their parents. A maximum of 50 killifish can be kept. Up to 10 killifish can be kept in one tank, Up to 5 aquariums can be set up. Functions ■Mode switching Default: Information on the killifish and aquarium is displayed, allowing the user to check the status of their care. Observation: Hides the display of information, allowing you to closely observe the aquarium and killifish. You can also tap on the water surface or the aquarium area to see if there is any reaction! Shooting: This function is useful when you want to hide the information and buttons and take pictures of only the killifish and the aquarium. ■Name your killifish You can name each killifish. You can name each killifish so that even if you have a lot of killifish, you will never lose track of them. Layout of the aquarium You can keep your killifish in your favorite decorated aquarium. There are a total of five types of layouts. Layout types: tank appearance, bottom sand, stones, plants, and ornaments. ■ Shop You can purchase killifish, aquariums and ornaments. There are 46 types of killifish sold in the store! ■Missions You can receive rewards by accomplishing various missions. You can purchase more items such as killifish and aquarium tanks by challenging many missions. ■Revival Chance If you are too busy to take care of your killifish and let them die, don't worry! You can bring them back to life with the Resurrection Chance! Premium Pack (paid feature) Clear ads from auto-display. - Eliminate banner ads - Eliminate interstitial ads Relief mode is released (can be switched). - killifish won't die. Useful functions added - Collective feeding - Collective cleaning All items can be purchased Daily mission rewards tripled 50,000 G present
Screenshots
Verdict
The clearest difference is ads: Medaka Breeder at none against Rice Fish's shown. Medaka Breeder also leads on update cadence (every 5 days vs every 4 months) and rating (4.7 vs 4.3). Rice Fish's advantage is monetization model (ad-supported vs free with in-app purchases). On price, review sentiment, ratings volume and in-app purchases 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.
Medaka Breeder holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 13 and 11 respectively. Written reviews split almost evenly too, at 67% and 67% positive.
Rice Fish ships an update every 4 months, Medaka Breeder every 5 days. The most recent releases landed on October 5, 2026 and October 12, 2026 respectively.
| Parameter | Rice Fish | Medaka Breeder |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (13 ratings) | 4.7 (11 ratings) — better |
| Positive reviews | 66.7% of reviews | 66.7% of reviews |
| Number of ratings | 13 — better | 11 |
| Update frequency | Every 4 months | Every 5 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 28 MB | 91 MB |
| Age rating | 4+ | 4+ |
| Developer | KENSHI DOI | Taiho Yanase |
Customer experience
Rice Fish
Medaka Breeder
In-app purchases
Rice Fish
No in-app purchases
Medaka Breeder
No in-app purchases







