# ウチのあざらしちゃん vs 空想水族館

The clearest difference is in-app purchases: 空想水族館 at none against ウチのあざらしちゃん's 4. 空想水族館 also leads on review sentiment (100% vs 66%). ウチのあざらしちゃん's advantage is ads (none vs shown) and update cadence (fortnightly vs every 2 months). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. ウチのあざらしちゃん sells 4 one-off in-app purchases. 空想水族館 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for ウチのあざらしちゃん against 4.9 for 空想水族館. Both are backed by a comparable volume of ratings — 7 and 8 respectively. Written reviews are what separate them: 66% of ウチのあざらしちゃん's written reviews are positive against 100% of 空想水族館's.

ウチのあざらしちゃん ships an update fortnightly, 空想水族館 every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | ウチのあざらしちゃん | 空想水族館 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (7 ratings)](https://appshunter.io/ios/app/id996868107/reviews) | **[4.9 (8 ratings)](https://appshunter.io/ios/app/id6443890302/reviews)** |
| Number of ratings | 7 | **8** |
| Positive reviews | 65.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | — | Ad-supported |
| Size | 40 MB | 395 MB |
| Requires iOS | **6.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [GOODROID,Inc.](https://appshunter.io/developer/951688937) | [ArtsPlanet](https://appshunter.io/developer/661686993) |

## What reviewers say

### ウチのあざらしちゃん

[App page](https://appshunter.io/ios/app/id996868107)

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 拡張レベル１ | $0.99 | one-time |
| 拡張レベル２ | $0.99 | one-time |
| 拡張レベル３ | $0.99 | one-time |
| 拡張レベル４ | $0.99 | one-time |


### 空想水族館

[App page](https://appshunter.io/ios/app/id6443890302)

Discover a futuristic aquarium filled with whimsical creatures. Collect unique animal hybrids through a free gacha system and uncover the aquarium's secrets in a fun, story-driven game. Enjoy simple, casual gameplay perfect for passing the time.

**Highlights:** Collect unique hybrid creatures, Free gacha system, Futuristic aquarium setting, Story-driven gameplay, Tilt sensor mechanics, Casual time-killing game

**In-app purchases:** none


## Frequently asked questions

### Is ウチのあざらしちゃん free?

ウチのあざらしちゃん is free to download, with in-app purchases available.

### Is 空想水族館 free?

空想水族館 is free to download, with no in-app purchases.

### Which has better reviews, ウチのあざらしちゃん or 空想水族館?

空想水族館 is rated higher. ウチのあざらしちゃん averages 4.9 out of 5 from 7 ratings, while 空想水族館 averages 4.9 from 8 ratings.

### Do ウチのあざらしちゃん or 空想水族館 have ads?

空想水族館 shows ads; ウチのあざらしちゃん does not.

### Which is updated more often, ウチのあざらしちゃん or 空想水族館?

ウチのあざらしちゃん ships an update fortnightly, and 空想水族館 every 2 months. Most recently, ウチのあざらしちゃん was updated on November 1, 2026 and 空想水族館 on November 3, 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.*