# 易工 vs Erosion 蚀

The clearest difference is in-app purchases: Erosion 蚀 at none against 易工's 1. Erosion 蚀 also leads on update cadence (fortnightly vs every 2 months). 易工's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.6). On price and ads there is nothing between them.

Both are free to download. 易工 sells 1 in-app purchase, starting at $6.99 per year. Erosion 蚀 asks for nothing beyond the download.

易工 ships an update every 2 months, Erosion 蚀 fortnightly. Both last shipped on October 19, 2026.

## The numbers

| Metric | 易工 | Erosion 蚀 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 1 MB | 1 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [庆福 曾](https://appshunter.io/developer/1464870475) | [名哲 张](https://appshunter.io/developer/1879661087) |

## What reviewers say

### 易工

[App page](https://appshunter.io/ios/app/id1633570403)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 高级版-连续包年 | $6.99 | per year |


### 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 易工 free?

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

### Is Erosion 蚀 free?

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

### Do 易工 or Erosion 蚀 have ads?

Neither 易工 nor Erosion 蚀 shows ads.

### Which is updated more often, 易工 or Erosion 蚀?

易工 ships an update every 2 months, and Erosion 蚀 fortnightly. Most recently, 易工 was updated on October 19, 2026 and Erosion 蚀 on October 19, 2026.

---

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