# 월성우주과학관 AR안내 vs 오푸스

The clearest difference is in-app purchases: 월성우주과학관 AR안내 at none against 오푸스's 6. 월성우주과학관 AR안내 also leads on iOS requirement (11.0 vs 15.1). 오푸스's advantage is update cadence (weekly vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. 오푸스 sells 6 one-off in-app purchases. 월성우주과학관 AR안내 asks for nothing beyond the download.

월성우주과학관 AR안내 ships an update every 3 months, 오푸스 weekly. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 월성우주과학관 AR안내 | 오푸스 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 670 MB | 134 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [K3I Co., Ltd.](https://appshunter.io/developer/954189424) | [NarrowLabs](https://appshunter.io/developer/1896334457) |

## What reviewers say

### 월성우주과학관 AR안내

[App page](https://appshunter.io/ios/app/ar/id1630121063)

**In-app purchases:** none


### 오푸스

[App page](https://appshunter.io/ios/app/id6766886016)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 잉크 20개 | $1.99 | one-time |
| 잉크 66개 | $5.99 | one-time |
| 잉크 100개 | $5.99 | one-time |
| 잉크 160개 | $14.99 | one-time |
| 잉크 340개 | $29.99 | one-time |
| 잉크 685개 | $59.99 | one-time |


## Frequently asked questions

### Is 월성우주과학관 AR안내 free?

월성우주과학관 AR안내 is free to download, with no in-app purchases.

### Is 오푸스 free?

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

### Do 월성우주과학관 AR안내 or 오푸스 have ads?

Neither 월성우주과학관 AR안내 nor 오푸스 shows ads.

### Which is updated more often, 월성우주과학관 AR안내 or 오푸스?

월성우주과학관 AR안내 ships an update every 3 months, and 오푸스 weekly. Most recently, 월성우주과학관 AR안내 was updated on November 7, 2026 and 오푸스 on October 31, 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.*