# Idle Aquaria vs ERAIASON

The clearest difference is price: Idle Aquaria at Free against ERAIASON's $4.99. Idle Aquaria also leads on update cadence (every 5 days vs every 3 weeks) and ratings volume (10 vs 2). ERAIASON's advantage is rating (5.0 vs 3.0) and in-app purchases (none vs 10). On device support and iOS requirement there is nothing between them.

Idle Aquaria is free to download; ERAIASON costs $4.99 up front. Idle Aquaria sells 10 one-off in-app purchases. ERAIASON asks for nothing beyond the download.

ERAIASON holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Idle Aquaria has 10 ratings behind it against 2, so its average is the more settled of the two.

Idle Aquaria ships an update every 5 days, ERAIASON every 3 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Idle Aquaria | ERAIASON |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [3.0 (10 ratings)](https://appshunter.io/ios/app/idle-aquaria-ocean-evolution/id6460979621/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/eraiason/id6751147600/reviews)** |
| Number of ratings | **10** | 2 |
| Positive reviews | 18.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 269 MB | 184 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Amberbite GmbH](https://appshunter.io/developer/1702231504) | [Christian Hahm](https://appshunter.io/developer/1833688520) |

## What reviewers say

### Idle Aquaria

[App page](https://appshunter.io/ios/app/idle-aquaria-ocean-evolution/id6460979621)

Embark on a meditative journey in a calming aquatic world. Consume smaller beings to evolve and discover over 50 unique species. Track your achievements in a diverse marine compendium. Enjoy tranquil escapism and engaging progression with seasonal events.

**Highlights:** Meditative aquatic journey, Evolve and discover 50+ species, Creature library and achievements, Tranquil and relaxing gameplay, Seasonal events and special occasions, Optimized for tablets

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pre-Registration Bundle | Free | one-time |
| 60 x2 Pearls | $0.99 | one-time |
| Welcome Bundle! | $1.99 | one-time |
| Spooky Splash Bundle! | $3.99 | one-time |
| Remove Ads | $3.99 | one-time |
| 300 Pearls | $4.99 | one-time |
| 300 x2 Pearls | $4.99 | one-time |
| Spooky Splash Bundle! | $14.99 | one-time |
| 980 Pearls | $14.99 | one-time |
| 6480 x2 Pearls | $99.99 | one-time |


### ERAIASON

[App page](https://appshunter.io/ios/app/eraiason/id6751147600)

Oversee a population of evolving AI robots in a dynamic voxel landscape. Design robots, build terrains, and influence their evolutionary path as they learn, adapt, and compete in a simulated ecosystem.

**Highlights:** Evolving AI robots, Dynamic voxel landscape, Robot design and creation, Environment manipulation, Interactive evolutionary control, Simulated ecosystem

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

**In-app purchases:** none


## Frequently asked questions

### Is Idle Aquaria free?

Idle Aquaria is free to download, with in-app purchases available.

### Is ERAIASON free?

ERAIASON costs $4.99, with no in-app purchases.

### Which has better reviews, Idle Aquaria or ERAIASON?

ERAIASON is rated higher. Idle Aquaria averages 3.0 out of 5 from 10 ratings, while ERAIASON averages 5.0 from 2 ratings.

### Do Idle Aquaria or ERAIASON have ads?

Idle Aquaria shows ads; ERAIASON does not.

### Which is updated more often, Idle Aquaria or ERAIASON?

Idle Aquaria ships an update every 5 days, and ERAIASON every 3 weeks. Most recently, Idle Aquaria was updated on November 3, 2026 and ERAIASON on October 30, 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.*