# Slime Evolution vs Birds Evolution Merge

The clearest difference is iOS requirement: Slime Evolution at 13.0 against Birds Evolution Merge'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 Birds Evolution Merge sells 14 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 4.7 for Birds Evolution Merge. Both are backed by a comparable volume of ratings — 597 and 852 respectively. Written reviews are what separate them: 91% of Slime Evolution's written reviews are positive against 87% of Birds Evolution Merge's.

Slime Evolution ships an update every 2 months, Birds Evolution Merge every 5 weeks. Both last shipped on October 22, 2026.

## The numbers

| Metric | Slime Evolution | Birds Evolution Merge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (597 ratings)](https://appshunter.io/ios/app/slime-evolution-raise-slimes/id1131103968/reviews)** | [4.7 (852 ratings)](https://appshunter.io/ios/app/birds-evolution-merge/id1171392372/reviews) |
| Number of ratings | 597 | **852** |
| Positive reviews | **91.2% of reviews** | 87.4% 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 | 156 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


### Birds Evolution Merge

[App page](https://appshunter.io/ios/app/birds-evolution-merge/id1171392372)

Combine various bird species to evolve them into new, bizarre forms. Explore different stages, unlock curious creatures, and discover unexpected endings in this evolutionary merge game. Earn coins through bird poop to buy more creatures and accelerate your progress.

**Highlights:** Combine similar birds to create new creatures, Evolve birds to discover exotic forms, Use bird poop coins to buy new creatures, Discover different stages and bird species, Unlock various possible endings, Incremental clicker gameplay

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

**In-app purchases (14)**

| 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 |
| instant coins doubler | $1.99 | one-time |
| Promo Bundles VeryHigh | $2.99 | one-time |
| Shop Bundle 1 | $2.99 | one-time |
| Hard Currency Pack 2 | $4.99 | one-time |
| big pack of rubies | $5.99 | one-time |
| income doubler | $5.99 | one-time |
| Shop Bundle 2 | $5.99 | one-time |
| Trinket | $6.99 | one-time |
| Hard Currency Pack 3 | $9.99 | one-time |
| starter bundle discount | $9.99 | one-time |

**What reviewers like**

- 💎 Addictive and fun gameplay
- 🎨 Ability to customize birds
- 🐦 Variety of bird species
- 🎶 Enjoyable music

**What reviewers complain about**

- 🔍 Repetitive gameplay
- 🛑 Excessive ads
- 🐛 Bugs and crashes
- 🔊 Music interruption issues

**Reported bugs**

- Inability to change bird colors
- Incorrect pricing in the store
- Game crashing after updates

**Requested features**

- More bird species and evolution stages
- Ability to listen to music while playing
- Improved performance and stability


## Frequently asked questions

### Is Slime Evolution free?

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

### Is Birds Evolution Merge free?

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

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

Slime Evolution is rated higher. Slime Evolution averages 4.8 out of 5 from 597 ratings, while Birds Evolution Merge averages 4.7 from 852 ratings.

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

Both Slime Evolution and Birds Evolution Merge show ads.

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

Slime Evolution ships an update every 2 months, and Birds Evolution Merge every 5 weeks. Most recently, Slime Evolution was updated on October 22, 2026 and Birds Evolution Merge on October 22, 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.*