# ぐるぐる ZEISS IV型 vs Cometarium コメタリウム

The clearest difference is update cadence: Cometarium コメタリウム at every 4 days against ぐるぐる ZEISS IV型's every 8 months. ぐるぐる ZEISS IV型's advantage is iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

ぐるぐる ZEISS IV型 ships an update every 8 months, Cometarium コメタリウム every 4 days. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ぐるぐる ZEISS IV型 | Cometarium コメタリウム |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 days** |
| Size | 188 MB | 11 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [IMAGE FACTORY CO., LTD.](https://appshunter.io/developer/882653089) | [Shinsuke Abe](https://appshunter.io/developer/6790818921) |

## What reviewers say

### ぐるぐる ZEISS IV型

[App page](https://appshunter.io/ios/app/zeiss-iv/id6456451720)

**In-app purchases:** none


### Cometarium コメタリウム

[App page](https://appshunter.io/ios/app/cometarium/id6801072934)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ぐるぐる ZEISS IV型 free?

ぐるぐる ZEISS IV型 is free to download, with no in-app purchases.

### Is Cometarium コメタリウム free?

Cometarium コメタリウム is free to download, with no in-app purchases.

### Do ぐるぐる ZEISS IV型 or Cometarium コメタリウム have ads?

Neither ぐるぐる ZEISS IV型 nor Cometarium コメタリウム shows ads.

### Which is updated more often, ぐるぐる ZEISS IV型 or Cometarium コメタリウム?

ぐるぐる ZEISS IV型 ships an update every 8 months, and Cometarium コメタリウム every 4 days. Most recently, ぐるぐる ZEISS IV型 was updated on October 27, 2026 and Cometarium コメタリウム 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.*