# D520 vs 地質羅盤 2.0

The clearest difference is update cadence: 地質羅盤 2.0 at every 9 days against D520's every 4 months. D520's advantage is iOS requirement (11.0 vs 13.0). 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.

D520 ships an update every 4 months, 地質羅盤 2.0 every 9 days. The most recent releases landed on September 28, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | D520 | 地質羅盤 2.0 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Size | 8 MB | 49 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SYSCODE INTERNATIONAL INC.](https://appshunter.io/developer/1056483582) | [Jet-Link Technologies Inc.](https://appshunter.io/developer/1154359182) |

## What reviewers say

### D520

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

**Features:** macOS Compatibility

**In-app purchases:** none


### 地質羅盤 2.0

[App page](https://appshunter.io/ios/app/20/id6443950944)

**In-app purchases:** none


## Frequently asked questions

### Is D520 free?

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

### Is 地質羅盤 2.0 free?

地質羅盤 2.0 is free to download, with no in-app purchases.

### Do D520 or 地質羅盤 2.0 have ads?

Neither D520 nor 地質羅盤 2.0 shows ads.

### Which is updated more often, D520 or 地質羅盤 2.0?

D520 ships an update every 4 months, and 地質羅盤 2.0 every 9 days. Most recently, D520 was updated on September 28, 2026 and 地質羅盤 2.0 on September 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.*