# Slime Evolution vs Merge Unicorn

The clearest difference is ads: Merge Unicorn at none against Slime Evolution's shown. Merge Unicorn also leads on update cadence (every 2 days vs every 2 months) and iOS requirement (8.0 vs 13.0). Slime Evolution's advantage is review sentiment (91% vs 77%). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. Slime Evolution sells 4 one-off in-app purchases and Merge Unicorn sells 3 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 — 4.8 for Slime Evolution against 4.6 for Merge Unicorn. Both are backed by a comparable volume of ratings — 597 and 338 respectively. Written reviews are what separate them: 91% of Slime Evolution's written reviews are positive against 77% of Merge Unicorn's.

Slime Evolution ships an update every 2 months, Merge Unicorn every 2 days. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Slime Evolution | Merge Unicorn |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (597 ratings)](https://appshunter.io/ios/app/slime-evolution-raise-slimes/id1131103968/reviews)** | [4.6 (338 ratings)](https://appshunter.io/ios/app/merge-unicorn-idle-evolution/id1437568273/reviews) |
| Number of ratings | **597** | 338 |
| Positive reviews | **91.2% of reviews** | 76.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 111 MB | 232 MB |
| Requires iOS | 13.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SeHyeon Im](https://appshunter.io/developer/1294084939) | [Evolution Games GmbH](https://appshunter.io/developer/1183768323) |

## What reviewers say

### Slime Evolution

[App page](https://appshunter.io/ios/app/slime-evolution-raise-slimes/id1131103968)

Cultivate a charming slime farm by merging identical slimes to discover new ones. Assign elemental properties like water, fire, or grass to influence their characteristics. Embark on adventures to collect more slimes and treasures, and document your discoveries in a field guide.

**Highlights:** Create new slimes by merging, Assign elemental properties (water, fire, grass), Go on adventures for rewards, Collect slimes in a field guide, Discover unique slime evolution methods

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 20 Gem | $0.99 | one-time |
| 110 Gem | $4.99 | one-time |
| 240 Gem | $9.99 | one-time |
| 1400 Gem | $49.99 | one-time |

**What reviewers like**

- 👍 Cute and relaxing game
- 🎨 Charming art style
- 🕹️ Simple and addictive gameplay
- ⏱️ Good time-killer
- 🌳 Enjoyable exploration and evolution

**What reviewers complain about**

- 🐛 Occasional bugs and glitches
- 💰 Unbalanced upgrade costs between platforms
- 🔍 Unclear mechanics (e.g. using seeds)
- 🌐 Language/localization issues

**Reported bugs**

- Inability to merge certain slime types
- Disappearing slimes and lost progress
- Ads not working or causing errors

**Requested features**

- Add more types of slimes
- Implement a slime shop/store
- Improve the reward system
- Add more gameplay modes or mini-games
- Enhance the exploration and progression systems


### Merge Unicorn

[App page](https://appshunter.io/ios/app/merge-unicorn-idle-evolution/id1437568273)

Merge identical unicorns to discover new, cuter evolutions. Earn coins while idle, tap to speed up, and invest wisely to grow your collection across continents and galaxies. Discover all 30 unique unicorn forms and unlock different game endings.

**Highlights:** Merge identical unicorns, Discover new evolutions, Idle coin earning, Tap to earn coins, Invest in gold income, Collect 30 unicorn forms, Offline play

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Bundle | $1.99 | one-time |
| Gamer Bundle | $4.99 | one-time |
| Master Bundle | $14.99 | one-time |

**What reviewers like**

- 🤩 Highly addictive gameplay
- 🦄 Cute and lovable unicorns
- 💖 Fun and enjoyable experience
- 😌 Relaxing and stress-relieving
- 🆓 Free to play

**What reviewers complain about**

- 👎 Old versions were better
- 💰 Frequent monetization prompts
- 📉 Progress loss at higher levels
- 🧩 Merging issues and glitches
- 🚫 Lack of sell button

**Reported bugs**

- Cannot merge items when having one of everything
- Level 21 locks up constantly
- Logo is squished on bundle pop-ups
- Drag and merge actions go to the wrong spot
- Upgrade says max level when it's not

**Requested features**

- Add a sell button for items
- Improve merging mechanics to prevent items going to wrong spots
- Fix issues with level 21 and higher progression
- Restore lost progress and purchases
- Improve detail in bundle pop-ups


## Frequently asked questions

### Is Slime Evolution free?

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

### Is Merge Unicorn free?

Merge Unicorn is free to download, with in-app purchases available.

### Which has better reviews, Slime Evolution or Merge Unicorn?

Slime Evolution is rated higher. Slime Evolution averages 4.8 out of 5 from 597 ratings, while Merge Unicorn averages 4.6 from 338 ratings.

### Do Slime Evolution or Merge Unicorn have ads?

Slime Evolution shows ads; Merge Unicorn does not.

### Which is updated more often, Slime Evolution or Merge Unicorn?

Slime Evolution ships an update every 2 months, and Merge Unicorn every 2 days. Most recently, Slime Evolution was updated on October 22, 2026 and Merge Unicorn on October 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.*