# Quirkies Evolution vs Zen Koi 2

The clearest difference is rating: Zen Koi 2 at 4.8 against Quirkies Evolution's 3.7. Zen Koi 2 also leads on ratings volume (30K vs 10). Quirkies Evolution's advantage is in-app purchases (none vs 63) and ads (none vs shown). On price, review sentiment, update cadence and device support there is nothing between them.

Both are free to download. Zen Koi 2 sells 63 one-off in-app purchases. Quirkies Evolution asks for nothing beyond the download.

Zen Koi 2 holds the better App Store score, 4.8 against 3.7. That said, the two scores are not equally well evidenced: Zen Koi 2 has 30K ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 70% of Quirkies Evolution's written reviews are positive against 71% of Zen Koi 2's.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on June 6, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Quirkies Evolution | Zen Koi 2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (10 ratings)](https://appshunter.io/ios/app/quirkies-evolution/id976739433/reviews) | **[4.8 (30K ratings)](https://appshunter.io/ios/app/zen-koi-2/id1280254438/reviews)** |
| Number of ratings | 10 | **30K** |
| Positive reviews | 70.0% of reviews | **71.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | Monthly |
| Monetization | **Free** | Free with in-app purchases |
| Size | 49 MB | 150 MB |
| Requires iOS | **7.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Indiana University](https://appshunter.io/developer/383456988) | [LandShark Games Pte. Ltd.](https://appshunter.io/developer/635142101) |

## What reviewers say

### Quirkies Evolution

[App page](https://appshunter.io/ios/app/quirkies-evolution/id976739433)

Explore the fascinating process of evolution through interactive gameplay. Guide populations of creatures by selecting mates and influencing traits to ensure survival and adaptation. Discover new characteristics, learn through engaging content, and track your progress via a detailed family tree.

**Highlights:** Simulate natural selection and reproduction, Influence trait evolution through mate selection, Explore genetic recombination and mutation, Learn via educational videos and podcasts, Earn badges and survival points, Manipulate genes in the biolab, Track lineage with family tree and population view

**Features:** macOS Compatibility

**In-app purchases:** none


### Zen Koi 2

[App page](https://appshunter.io/ios/app/zen-koi-2/id1280254438)

Nurture and breed vibrant koi, guiding them through a serene journey to transform into majestic dragons. Customize your underwater sanctuary and create unique constellations in a breathtaking celestial realm.

**Highlights:** Breed and nurture koi, Transform koi into dragons, Explore the Dragon Realm, Craft and share constellations, Customize personal aquarium, Compete on leaderboards

**Features:** Vision Pro support

**In-app purchases (63)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small handful of Pearls | $1.99 | one-time |
| Starter Pack | $1.99 | one-time |
| Value Pack | $1.99 | one-time |
| Offer Pack | $1.99 | one-time |
| Fun Pack | $3.99 | one-time |
| Suiryū Pack | $3.99 | one-time |
| Senkou Pack | $3.99 | one-time |
| Shodo Pack | $3.99 | one-time |
| Zashi Pack | $3.99 | one-time |
| Hageshī Pack | $3.99 | one-time |
| Ryūtai Pack | $3.99 | one-time |
| Seiun Pack | $3.99 | one-time |
| Saibā Pack | $3.99 | one-time |
| Handful of Pearls | $4.99 | one-time |
| Nice Pack | $8.99 | one-time |
| Hanrin Pack | $8.99 | one-time |
| Bag of Pearls | $9.99 | one-time |
| Tsuru Pack | $9.99 | one-time |
| Saishō Pack | $9.99 | one-time |
| Minori Pack | $9.99 | one-time |
| Tsurai Pack | $9.99 | one-time |
| Origami Pack | $9.99 | one-time |
| Boronoi Pack | $9.99 | one-time |
| Cheshā Pack | $9.99 | one-time |
| Meiro Pack | $9.99 | one-time |
| Kurōjū Pack | $9.99 | one-time |
| Konoha Pack | $9.99 | one-time |
| Sanbīmu Pack | $9.99 | one-time |
| Burokku Pack | $9.99 | one-time |
| Wagasa Pack | $9.99 | one-time |
| Torippī Pack | $9.99 | one-time |
| Nitto Pack | $9.99 | one-time |
| Showa Pack | $9.99 | one-time |
| Sakyū Pack | $9.99 | one-time |
| Enaga Pack | $9.99 | one-time |
| Daimon Pack | $9.99 | one-time |
| Akinoha Pack | $9.99 | one-time |
| Robotto Pack | $9.99 | one-time |
| Kumo Pack | $9.99 | one-time |
| Guradē Pack | $9.99 | one-time |
| Azarashi Pack | $9.99 | one-time |
| Reinī Pack | $9.99 | one-time |
| Māburu Pack | $9.99 | one-time |
| Berī Pack | $9.99 | one-time |
| Byōga Pack | $9.99 | one-time |
| Baabaa Pack | $9.99 | one-time |
| Itoo Pack | $9.99 | one-time |
| Taiju Pack | $18.99 | one-time |
| Seiryu Pack | $19.99 | one-time |
| Ireke Pack | $19.99 | one-time |
| Dōnatsu Pack | $19.99 | one-time |
| Uranai Pack | $19.99 | one-time |
| Kagami Pack | $19.99 | one-time |
| Kaō Pack | $19.99 | one-time |
| Norudiku Pack | $19.99 | one-time |
| Karasu Pack | $19.99 | one-time |
| Shojo Pack | $19.99 | one-time |
| Mikkusu Pack | $19.99 | one-time |
| Inko Pack | $19.99 | one-time |
| Habu Pack | $19.99 | one-time |
| Ōrora Pack | $19.99 | one-time |
| Hareta Pack | $19.99 | one-time |
| Huge chest of Pearls | $99.99 | one-time |

**What reviewers like**

- 🌊 Relaxing and calming game
- 🐉 Ability to play as dragons
- 🎨 Beautiful graphics and animations
- 🎶 Soothing music
- 🔓 No intrusive ads

**What reviewers complain about**

- 🕰️ Slow progression and high costs for new koi slots
- 🐟 Repetitive prey-catching gameplay
- 🔌 Connectivity issues and loading problems
- 🤖 Unsatisfying dragon gameplay

**Reported bugs**

- Saved progress being lost or not loading properly
- Glitches with dragon appearances

**Requested features**

- Offline play mode
- More variety in pond environments and prey
- Ability to interact with and customize dragons
- Easier way to complete collections
- Improved friend integration and trading


## Frequently asked questions

### Is Quirkies Evolution free?

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

### Is Zen Koi 2 free?

Zen Koi 2 is free to download, with in-app purchases available.

### Which has better reviews, Quirkies Evolution or Zen Koi 2?

Zen Koi 2 is rated higher. Quirkies Evolution averages 3.7 out of 5 from 10 ratings, while Zen Koi 2 averages 4.8 from 30K ratings.

### Do Quirkies Evolution or Zen Koi 2 have ads?

Zen Koi 2 shows ads; Quirkies Evolution does not.

### Which is updated more often, Quirkies Evolution or Zen Koi 2?

Quirkies Evolution ships an update monthly, and Zen Koi 2 monthly. Most recently, Quirkies Evolution was updated on June 6, 2026 and Zen Koi 2 on September 27, 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.*