# Fish Evolution vs Monster FishIO

The clearest difference is review sentiment: Fish Evolution at 100% against Monster FishIO's 0%. Fish Evolution also leads on rating (4.3 vs 3.0) and in-app purchases (none vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Monster FishIO sells 1 one-off in-app purchase. Fish Evolution asks for nothing beyond the download.

Fish Evolution holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: Fish Evolution has 40 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 100% of Fish Evolution's written reviews are positive against 0% of Monster FishIO's.

Fish Evolution ships an update fortnightly, Monster FishIO every 2 months. The most recent releases landed on October 22, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Fish Evolution | Monster FishIO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (40 ratings)](https://appshunter.io/ios/app/fish-evolution/id1658224047/reviews)** | [3.0 (4 ratings)](https://appshunter.io/ios/app/monster-fishio-big-eat-small/id6445980017/reviews) |
| Number of ratings | **40** | 4 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 216 MB | 176 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 9+ |
| Developer | [佳灿 李](https://appshunter.io/developer/1637818097) | [ICEBEAR., JSC](https://appshunter.io/developer/1499620037) |

## What reviewers say

### Fish Evolution

[App page](https://appshunter.io/ios/app/fish-evolution/id1658224047)

Navigate the deep sea as a small fish, eating smaller prey to grow and evolve. Avoid larger predators and use power-ups to survive and become the ocean's overlord in this engaging casual game.

**Highlights:** Evolve from clownfish to sharks and behemoths, Eat smaller fish to grow, Avoid larger predators, Free to play, New themed skins, Powerful prop effects

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

**In-app purchases:** none


### Monster FishIO

[App page](https://appshunter.io/ios/app/monster-fishio-big-eat-small/id6445980017)

Engage in a thrilling underwater battle for survival. Grow by consuming smaller fish and avoid larger predators to become the ultimate king of the sea. Upgrade your fish and weapons to dominate the ocean.

**Highlights:** Eat smaller fish to grow, Avoid larger predators, Upgrade fish and weapons, Dominate the sea, Compete on leaderboards, Collect rewards

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Fish Evolution free?

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

### Is Monster FishIO free?

Monster FishIO is free to download, with in-app purchases available.

### Which has better reviews, Fish Evolution or Monster FishIO?

Fish Evolution is rated higher. Fish Evolution averages 4.3 out of 5 from 40 ratings, while Monster FishIO averages 3.0 from 4 ratings.

### Do Fish Evolution or Monster FishIO have ads?

Both Fish Evolution and Monster FishIO show ads.

### Which is updated more often, Fish Evolution or Monster FishIO?

Fish Evolution ships an update fortnightly, and Monster FishIO every 2 months. Most recently, Fish Evolution was updated on October 22, 2026 and Monster FishIO on October 15, 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.*