# Stretchy Natto vs 空想水族館

The clearest difference is rating: 空想水族館 at 4.9 against Stretchy Natto's 2.9. 空想水族館 also leads on update cadence (every 2 months vs every 9 months) and review sentiment (100% vs 78%). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

空想水族館 holds the better App Store score, 4.9 against 2.9. Both are backed by a comparable volume of ratings — 9 and 8 respectively. Written reviews point the same way: 78% of Stretchy Natto's written reviews are positive against 100% of 空想水族館's.

Stretchy Natto ships an update every 9 months, 空想水族館 every 2 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Stretchy Natto | 空想水族館 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (9 ratings)](https://appshunter.io/ios/app/stretchy-natto/id564091775/reviews) | **[4.9 (8 ratings)](https://appshunter.io/ios/app/id6443890302/reviews)** |
| Number of ratings | **9** | 8 |
| Positive reviews | 78.2% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | Ad-supported | Ad-supported |
| Size | 36 MB | 395 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [takuya ori](https://appshunter.io/developer/449472183) | [ArtsPlanet](https://appshunter.io/developer/661686993) |

## What reviewers say

### Stretchy Natto

[App page](https://appshunter.io/ios/app/stretchy-natto/id564091775)

Experience the unique texture of fermented soybeans by stirring and stretching them as far as possible. This simple yet engaging game challenges your dexterity and offers a fun, quirky way to pass the time. Enjoy a satisfyingly stretchy sensation with easy-to-learn controls.

**Highlights:** Stir nattō for 5 seconds, Stretch nattō upwards, Simple, easy-to-learn gameplay, Satisfying stretchy sensation, Challenging dexterity

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Stretchy Natto free?

Stretchy Natto is free to download, with no in-app purchases.

### 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, Stretchy Natto or 空想水族館?

空想水族館 is rated higher. Stretchy Natto averages 2.9 out of 5 from 9 ratings, while 空想水族館 averages 4.9 from 8 ratings.

### Do Stretchy Natto or 空想水族館 have ads?

Both Stretchy Natto and 空想水族館 show ads.

### Which is updated more often, Stretchy Natto or 空想水族館?

Stretchy Natto ships an update every 9 months, and 空想水族館 every 2 months. Most recently, Stretchy Natto was updated on October 23, 2026 and 空想水族館 on October 24, 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.*