# 格式转换宝 vs Erosion 蚀

The clearest difference is in-app purchases: Erosion 蚀 at none against 格式转换宝's 4. 格式转换宝's advantage is iOS requirement (14.0 vs 17.6). On price there is nothing between them.

Both are free to download. 格式转换宝 sells 4 one-off in-app purchases. Erosion 蚀 asks for nothing beyond the download.

## The numbers

| Metric | 格式转换宝 | Erosion 蚀 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | — | No |
| Update frequency | — | Fortnightly |
| Size | 40 MB | 1 MB |
| Requires iOS | **14.0** | 17.6 |
| Devices | — | **iPhone** |
| Age rating | 4+ | 4+ |
| Developer | [双梅 覃](https://appshunter.io/developer/1819508835) | [名哲 张](https://appshunter.io/developer/1879661087) |

## What reviewers say

### 格式转换宝

[App page](https://appshunter.io/ios/app/id6747810079)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $1.99 | one-time |
| 月会员 | $2.99 | one-time |
| 年会员 | $4.99 | one-time |
| 永久会员 | $8.99 | one-time |


### Erosion 蚀

[App page](https://appshunter.io/ios/app/erosion/id6761682068)

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

**In-app purchases:** none


## Frequently asked questions

### Is 格式转换宝 free?

格式转换宝 is free to download, with in-app purchases available.

### Is Erosion 蚀 free?

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

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*