# Slime Evolution vs Robot Evolution

The clearest difference is iOS requirement: Slime Evolution at 13.0 against Robot Evolution's 15.0. On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Slime Evolution sells 4 one-off in-app purchases and Robot Evolution sells 12 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 Robot Evolution. Both are backed by a comparable volume of ratings — 596 and 729 respectively. Written reviews are what separate them: 92% of Slime Evolution's written reviews are positive against 86% of Robot Evolution's.

Slime Evolution ships an update every 2 months, Robot Evolution every 6 weeks. The most recent releases landed on October 2, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Slime Evolution | Robot Evolution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (596 ratings)](https://appshunter.io/ios/app/slime-evolution-raise-slimes/id1131103968/reviews) | [4.8 (729 ratings)](https://appshunter.io/ios/app/robot-evolution-machine-merge/id1275133471/reviews) |
| Number of ratings | 596 | **729** |
| Positive reviews | **91.5% of reviews** | 85.9% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 111 MB | 155 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| 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


### Robot Evolution

[App page](https://appshunter.io/ios/app/robot-evolution-machine-merge/id1275133471)

Merge robots to create bizarre new machines and build a powerful army. Discover various robot types across different stages and unlock multiple endings. Tap or drag to earn coins and expand your collection.

**Highlights:** Drag and drop robots to merge, Discover new robot types, Earn coins to buy creatures, Build a high-tech army, Unlock various endings, Idle clicker gameplay

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| pack of rubies | $1.99 | one-time |
| Hard Currency Pack 1 | $1.99 | one-time |
| pack with diamonds | $1.99 | one-time |
| Remove Ads | $1.99 | one-time |
| Shop Bundle | $2.99 | one-time |
| Promo Bundles Very High | $2.99 | one-time |
| Hard Currency Pack 2 | $4.99 | one-time |
| big pack of rubies | $5.99 | one-time |
| Shop Bundle | $5.99 | one-time |
| Trinket | $6.99 | one-time |
| Hard Currency Pack 3 | $9.99 | one-time |
| starter bundle | $24.99 | one-time |

**What reviewers like**

- 👍 Awesome game
- 🤖 Fun robot evolutions
- 💡 Lots of unique robot designs
- 🕹️ Addictive gameplay
- 🎨 Cute and colorful visuals

**What reviewers complain about**

- 🔍 Some features feel hidden or unclear
- 🔋 High battery consumption
- 🔗 Frequent ads interrupting gameplay
- 🐛 Occasional bugs and glitches

**Reported bugs**

- Game freezes or pauses when switching between screens
- Inconsistent berry drop rates despite upgrades
- Ads sometimes cause the game to crash

**Requested features**

- Add more evolution games on iOS
- Improve screen compatibility for newer devices
- Reduce frequency of ads or provide ad-free option
- Add ability to delete game progress


## Frequently asked questions

### Is Slime Evolution free?

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

### Is Robot Evolution free?

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

### Which has better reviews, Slime Evolution or Robot Evolution?

Slime Evolution and Robot Evolution are both rated 4.8 out of 5 on the App Store, from 596 and 729 ratings respectively.

### Do Slime Evolution or Robot Evolution have ads?

Both Slime Evolution and Robot Evolution show ads.

### Which is updated more often, Slime Evolution or Robot Evolution?

Slime Evolution ships an update every 2 months, and Robot Evolution every 6 weeks. Most recently, Slime Evolution was updated on October 2, 2026 and Robot Evolution on September 28, 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.*