# 馬里蘭文教機構 vs D520

The clearest difference is update cadence: 馬里蘭文教機構 at monthly against D520's every 4 months. D520's advantage is iOS requirement (11.0 vs 16.0). 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.

馬里蘭文教機構 ships an update monthly, D520 every 4 months. Both last shipped on October 26, 2026.

## The numbers

| Metric | 馬里蘭文教機構 | D520 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Size | 57 MB | 8 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [HUI KUNG](https://appshunter.io/developer/985538164) | [SYSCODE INTERNATIONAL INC.](https://appshunter.io/developer/1056483582) |

## What reviewers say

### 馬里蘭文教機構

[App page](https://appshunter.io/ios/app/id1485667360)

**Features:** macOS Compatibility

**In-app purchases:** none


### D520

[App page](https://appshunter.io/ios/app/d520/id1485830042)

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

**In-app purchases:** none


## Frequently asked questions

### Is 馬里蘭文教機構 free?

馬里蘭文教機構 is free to download, with no in-app purchases.

### Is D520 free?

D520 is free to download, with no in-app purchases.

### Do 馬里蘭文教機構 or D520 have ads?

Neither 馬里蘭文教機構 nor D520 shows ads.

### Which is updated more often, 馬里蘭文教機構 or D520?

馬里蘭文教機構 ships an update monthly, and D520 every 4 months. Most recently, 馬里蘭文教機構 was updated on October 26, 2026 and D520 on October 26, 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.*