Koi vs Coelacanth and ancient fish
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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.
Coelacanth and ancient fish
Customize coelacanth colors and feed them to earn points. Excavate fossils for bonuses and purchase new backgrounds and creatures. Experience AR to bring the ancient world into your room.
- Color customization for coelacanth
- Dynamic predation for points
- Fossil excavation with bonus multipliers
- Purchase background images and creatures
- AR function for recreating ancient worlds
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● You can adjust the coelacanth to your favorite color by using the color adjustment food. There is also high point food, and you can get points while looking at the dynamic predation. Points can buy background images and ancient creatures. ● You can get points by excavating fossils and rewarding them. Select a colored stone and tap it carefully to crush the stone. If you take out the fossil inside without damaging it, you will get a perfect bonus. The bonus multiplier will increase as you issue Perfects in succession. The points of fossils change depending on their rarity. Let's get reward food while having fun. ● Equipped with AR function. You can recreate the ancient world in your room.
Screenshots
Verdict
The clearest difference is rating: Koi at 4.3 against Coelacanth and ancient fish's 3.7. Koi also leads on ratings volume (36 vs 7). Coelacanth and ancient fish's advantage is update cadence (every 5 weeks vs every 20 months) and review sentiment (50% vs 33%). On price, ads, in-app purchases and monetization model 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.
Koi holds the better App Store score, 4.3 against 3.7. That said, the two scores are not equally well evidenced: Koi has 36 ratings behind it against 7, so its average is the more settled of the two. Written reviews complicate that: 33% of Koi's written reviews are positive against 50% of Coelacanth and ancient fish's, so the app with the better star average is not the one people write more warmly about.
Koi ships an update every 20 months, Coelacanth and ancient fish every 5 weeks. Both last shipped on November 3, 2026.
| Parameter | Koi | Coelacanth and ancient fish |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (36 ratings) — better | 3.7 (7 ratings) |
| Positive reviews | 33.3% of reviews | 50.0% of reviews — better |
| Number of ratings | 36 — better | 7 |
| Update frequency | Every 20 months | Every 5 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 126 MB | 108 MB |
| Age rating | 12+ | 4+ |
| Developer | HAREPPO | Yamabus |
Customer experience
Koi
Coelacanth and ancient fish
In-app purchases
Koi
No in-app purchases
Coelacanth and ancient fish
No in-app purchases
Questions
Is Koi free?
Is Coelacanth and ancient fish free?
Which has better reviews, Koi or Coelacanth and ancient fish?
Do Koi or Coelacanth and ancient fish have ads?
Which is updated more often, Koi or Coelacanth and ancient fish?
Other comparisons
