# 空想水族館 vs Chigai Tap

The clearest difference is in-app purchases: 空想水族館 at none against Chigai Tap's 1. 空想水族館 also leads on iOS requirement (12.0 vs 15.0). Chigai Tap's advantage is update cadence (every 3 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Chigai Tap sells 1 one-off in-app purchase. 空想水族館 asks for nothing beyond the download.

空想水族館 ships an update every 2 months, Chigai Tap every 3 days. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 空想水族館 | Chigai Tap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (8 ratings)](https://appshunter.io/ios/app/id6443890302/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 395 MB | 4 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ArtsPlanet](https://appshunter.io/developer/661686993) | [Hiromasa Takatsuka](https://appshunter.io/developer/1887465065) |

## What reviewers say

### 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


### Chigai Tap

[App page](https://appshunter.io/ios/app/chigai-tap/id6761328994)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad-Free | $1.99 | one-time |


## Frequently asked questions

### Is 空想水族館 free?

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

### Is Chigai Tap free?

Chigai Tap is free to download, with in-app purchases available.

### Do 空想水族館 or Chigai Tap have ads?

Both 空想水族館 and Chigai Tap show ads.

### Which is updated more often, 空想水族館 or Chigai Tap?

空想水族館 ships an update every 2 months, and Chigai Tap every 3 days. Most recently, 空想水族館 was updated on October 27, 2026 and Chigai Tap on October 25, 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.*