# Slime Evolution vs Penguin Merge Evolution

The clearest difference is ratings volume: Penguin Merge Evolution at 3.7K against Slime Evolution's 596. Slime Evolution's advantage is iOS requirement (13.0 vs 15.0). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Slime Evolution sells 4 one-off in-app purchases and Penguin Merge Evolution sells 13 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 4.8 for Penguin Merge Evolution. That said, the two scores are not equally well evidenced: Penguin Merge Evolution has 3.7K ratings behind it against 596, so its average is the more settled of the two. Written reviews are what separate them: 92% of Slime Evolution's written reviews are positive against 93% of Penguin Merge Evolution's.

Slime Evolution ships an update every 2 months, Penguin Merge Evolution every 5 weeks. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Slime Evolution | Penguin Merge Evolution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (596 ratings)](https://appshunter.io/ios/app/slime-evolution-raise-slimes/id1131103968/reviews) | [4.8 (3.7K ratings)](https://appshunter.io/ios/app/penguin-merge-evolution/id1188475572/reviews) |
| Number of ratings | 596 | **3.7K** |
| Positive reviews | 91.5% of reviews | **92.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 111 MB | 152 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +9 |
| Developer | [SeHyeon Im](https://appshunter.io/developer/1294084939) | [TPG TECNOLOGIA DA INFORMACAO LTDA](https://appshunter.io/developer/444343830) |

## 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


### Penguin Merge Evolution

[App page](https://appshunter.io/ios/app/penguin-merge-evolution/id1188475572)

Combine adorable penguins to evolve them into bizarre and exotic new forms. Tap to earn coins, buy more creatures, and discover different endings in this unique merge and clicker game.

**Highlights:** Combine similar penguins, Evolve to discover new forms, Earn penguin poop coins, Buy new creatures, Tap to make coins, Discover different endings

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |
| Hard Currency Pack 1 | $1.99 | one-time |
| pack with diamonds | $1.99 | one-time |
| Pack of Rubies | $1.99 | one-time |
| Shop Bundle 1 | $2.99 | one-time |
| Promo Bundles VeryHigh | $2.99 | one-time |
| Hard Currency Pack 2 | $4.99 | one-time |
| big pack of rubies | $5.99 | one-time |
| Shop Bundle 2 | $5.99 | one-time |
| Promo Bundles High | $5.99 | one-time |
| Trinket | $6.99 | one-time |
| Starter Bundle | $9.99 | one-time |
| Hard Currency Pack 3 | $9.99 | one-time |

**What reviewers like**

- 🐧 Cute and fun penguins
- 👍 Simple and addictive gameplay
- 💎 Ability to customize penguins
- 🎨 Variety of penguin types and evolutions

**What reviewers complain about**

- 🔍 Repetitive gameplay
- 💰 Too many ads
- 🐛 Bugs and glitches (disappearing items, loading issues)

**Reported bugs**

- Penguins losing customized items
- Frequent crashes and loading problems
- In-app purchases not working

**Requested features**

- More evolution games (e.g. bear, unicorn)
- Cloud save/sync functionality
- Reduce frequency of ads


## Frequently asked questions

### Is Slime Evolution free?

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

### Is Penguin Merge Evolution free?

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

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

Slime Evolution and Penguin Merge Evolution are both rated 4.8 out of 5 on the App Store, from 596 and 3.7K ratings respectively.

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

Both Slime Evolution and Penguin Merge Evolution show ads.

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

Slime Evolution ships an update every 2 months, and Penguin Merge Evolution every 5 weeks. Most recently, Slime Evolution was updated on September 24, 2026 and Penguin Merge Evolution on September 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*