# Zen Koi Classic vs Shark Evolution

The clearest difference is update cadence: Shark Evolution at every 6 weeks against Zen Koi Classic's every 3 months. Shark Evolution also leads on ratings volume (7.1K vs 2.1K). Zen Koi Classic's advantage is iOS requirement (13.0 vs 15.0). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Zen Koi Classic sells 10 one-off in-app purchases and Shark Evolution sells 11 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for Zen Koi Classic against 4.8 for Shark Evolution. Both are backed by a comparable volume of ratings — 2.1K and 7.1K respectively. Written reviews are what separate them: 86% of Zen Koi Classic's written reviews are positive against 88% of Shark Evolution's.

Zen Koi Classic ships an update every 3 months, Shark Evolution every 6 weeks. The most recent releases landed on September 21, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Zen Koi Classic | Shark Evolution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (2.1K ratings)](https://appshunter.io/ios/app/zen-koi-classic/id896575207/reviews) | **[4.8 (7.1K ratings)](https://appshunter.io/ios/app/shark-evolution-clicker-game/id1114932076/reviews)** |
| Number of ratings | 2.1K | **7.1K** |
| Positive reviews | 85.9% of reviews | **88.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 125 MB | 158 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LandShark Games Pte. Ltd.](https://appshunter.io/developer/635142101) | [TPG TECNOLOGIA DA INFORMACAO LTDA](https://appshunter.io/developer/444343830) |

## What reviewers say

### Zen Koi Classic

[App page](https://appshunter.io/ios/app/zen-koi-classic/id896575207)

Nurture and collect vibrant Koi fish in a serene underwater world. Watch them grow, evolve into majestic dragons, and discover hundreds of unique varieties. Share your collection with friends and enjoy a calming, visually stunning experience.

**Highlights:** Breed and collect hundreds of unique Koi varieties, Watch Koi evolve into majestic dragons, Soothing music and mesmerizing visuals, Intuitive single-touch controls, Share and gift Koi with friends, Limited edition rewards for collectors

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Pack | $1.99 | one-time |
| Small Handful of pearls | $1.99 | one-time |
| Handful of pearls | $4.99 | one-time |
| Hasu Pack | $4.99 | one-time |
| Bag of pearls | $9.99 | one-time |
| Tenshi Pack | $9.99 | one-time |
| Splatto Pack | $9.99 | one-time |
| Yajiri Pack | $9.99 | one-time |
| Monkī Pack | $19.99 | one-time |
| Nami Pack | $19.99 | one-time |

**What reviewers like**

- 🌊 Relaxing and calming gameplay
- 🎨 Beautiful and intricate koi designs
- 🐉 Enjoyment of breeding and evolving koi into dragons
- 🕰️ Great way to pass time and de-stress
- 🎶 Soothing and pleasant background music

**What reviewers complain about**

- 💰 Difficulty earning pearls without in-app purchases
- 🔒 Limited number of koi/egg slots without spending pearls
- 🐛 Occasional crashes and bugs after updates
- 🆕 Concerns about losing progress after updates
- 📺 Disruptive full-screen ads

**Reported bugs**

- Koi and dragon progress lost after updates
- Inconsistent koi movement and speed issues
- Ads causing frequent crashes or freezes

**Requested features**

- Ability to play as or interact with dragons
- More koi slots or alternative ways to expand pond
- Easier ways to earn pearls without watching ads
- Ability to name or customize koi and dragons
- Zoom out feature to see full pond layout


### Shark Evolution

[App page](https://appshunter.io/ios/app/shark-evolution-clicker-game/id1114932076)

Combine and evolve various shark species to create new, scarier creatures. Tap to earn coins, unlock new species, and discover different endings in this incremental clicker game.

**Highlights:** Combine similar sharks to evolve, Discover new shark species, Earn coins by tapping sharks, Unlock new creatures with coins, Explore different game stages, Multiple possible endings

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ads removal | $0.99 | one-time |
| pack of rubies | $1.99 | one-time |
| instant coins doubler | $1.99 | one-time |
| pack with some diamonds | $1.99 | one-time |
| pack of diamonds | $1.99 | one-time |
| pack with more diamonds | $4.99 | one-time |
| big pack of rubies | $5.99 | one-time |
| income doubler | $5.99 | one-time |
| Trinket | $6.99 | one-time |
| pack with plenty of diamonds | $9.99 | one-time |
| starter bundle with discount | $9.99 | one-time |

**What reviewers like**

- 👍 Fun and addictive game
- 🦈 Unique shark-themed evolution
- 💗 Cute and creative shark designs
- 🤩 Engaging gameplay loop
- 🎨 Visually appealing underwater theme

**What reviewers complain about**

- 🤖 Frequent and intrusive ads
- 🐛 Bugs and glitches (crashes, lost progress)
- 💰 Expensive in-app purchases
- 🕰️ Repetitive gameplay over time
- 🤔 Questionable evolutionary logic

**Reported bugs**

- Game freezes or crashes
- Offline earnings disappearing
- Purchased hats/items not showing up
- Compatibility issues on older devices

**Requested features**

- More shark evolution varieties
- Offline progress saving
- Reduced ad frequency
- Improved performance and stability
- Frog, dolphin, or other animal evolution games


## Frequently asked questions

### Is Zen Koi Classic free?

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

### Is Shark Evolution free?

Shark Evolution is free to download, with in-app purchases available.

### Which has better reviews, Zen Koi Classic or Shark Evolution?

Shark Evolution is rated higher. Zen Koi Classic averages 4.7 out of 5 from 2.1K ratings, while Shark Evolution averages 4.8 from 7.1K ratings.

### Do Zen Koi Classic or Shark Evolution have ads?

Both Zen Koi Classic and Shark Evolution show ads.

### Which is updated more often, Zen Koi Classic or Shark Evolution?

Zen Koi Classic ships an update every 3 months, and Shark Evolution every 6 weeks. Most recently, Zen Koi Classic was updated on September 21, 2026 and Shark Evolution on September 24, 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.*