# 康軒AR四季星空 vs RubiMask

The clearest difference is in-app purchases: 康軒AR四季星空 at none against RubiMask's 3. 康軒AR四季星空 also leads on ads (none vs shown) and iOS requirement (11.0 vs 17.0). RubiMask's advantage is update cadence (every 4 weeks vs every 42 months). On price and device support there is nothing between them.

Both are free to download. RubiMask sells 3 in-app purchases, starting at $2.99 per month. 康軒AR四季星空 asks for nothing beyond the download.

康軒AR四季星空 ships an update every 42 months, RubiMask every 4 weeks. The most recent releases landed on October 7, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | 康軒AR四季星空 | RubiMask |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 42 months | **Every 4 weeks** |
| Size | 160 MB | 26 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [康軒文教事業](https://appshunter.io/developer/431546873) | [KeiK LLC](https://appshunter.io/developer/1854674572) |

## What reviewers say

### 康軒AR四季星空

[App page](https://appshunter.io/ios/app/ar/id1585483774)

**Features:** macOS Compatibility

**In-app purchases:** none


### RubiMask

[App page](https://appshunter.io/ios/app/rubimask-ocr-pdf-scanner/id6756987331)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RubiMask Premium | $2.99 | per month |
| RubiMask Premium | $11.99 | per year |
| RubiMask Premium | $19.99 | one-time |


## Frequently asked questions

### Is 康軒AR四季星空 free?

康軒AR四季星空 is free to download, with no in-app purchases.

### Is RubiMask free?

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

### Do 康軒AR四季星空 or RubiMask have ads?

RubiMask shows ads; 康軒AR四季星空 does not.

### Which is updated more often, 康軒AR四季星空 or RubiMask?

康軒AR四季星空 ships an update every 42 months, and RubiMask every 4 weeks. Most recently, 康軒AR四季星空 was updated on October 7, 2026 and RubiMask on September 30, 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.*