# Slime Evolution vs Tails.io

Slime Evolution and Tails.io both sit at 4.8 stars, but that hides the real split: 91% of Slime Evolution's written reviews are positive against 69% of Tails.io's. Slime Evolution also leads on iOS requirement (13.0 vs 15.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Slime Evolution sells 4 one-off in-app purchases and Tails.io sells 1 one-off in-app purchase. 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 Tails.io. Both are backed by a comparable volume of ratings — 597 and 573 respectively. Written reviews are what separate them: 91% of Slime Evolution's written reviews are positive against 69% of Tails.io's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 22, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Slime Evolution | Tails.io |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (597 ratings)](https://appshunter.io/ios/app/slime-evolution-raise-slimes/id1131103968/reviews)** | [4.7 (573 ratings)](https://appshunter.io/ios/app/tailsio/id1475072432/reviews) |
| Number of ratings | **597** | 573 |
| Positive reviews | **91.2% of reviews** | 69.2% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 111 MB | 148 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [SeHyeon Im](https://appshunter.io/developer/1294084939) | [ponos corporation](https://appshunter.io/developer/297248421) |

## 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


### Tails.io

[App page](https://appshunter.io/ios/app/tailsio/id1475072432)

Engage in exciting tail-based combat by tapping and dragging to move, then releasing to attack. Grow your tail by eating meat, avoid poisonous mushrooms, and strategize your attacks to survive stages and defeat bosses. Compete for victory in championship challenges.

**Highlights:** Simple tap and drag controls, Grow tail by eating meat, Avoid poisonous mushrooms, Strategic tail attacks, Survive regular stages, Defeat boss characters, Collect coins in bonus stages

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Slime Evolution free?

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

### Is Tails.io free?

Tails.io is free to download, with in-app purchases available.

### Which has better reviews, Slime Evolution or Tails.io?

Slime Evolution is rated higher. Slime Evolution averages 4.8 out of 5 from 597 ratings, while Tails.io averages 4.7 from 573 ratings.

### Do Slime Evolution or Tails.io have ads?

Both Slime Evolution and Tails.io show ads.

### Which is updated more often, Slime Evolution or Tails.io?

Slime Evolution ships an update every 2 months, and Tails.io every 2 months. Most recently, Slime Evolution was updated on October 22, 2026 and Tails.io on October 29, 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.*