# iMaster vs 东成EHS

The clearest difference is update cadence: 东成EHS at weekly against iMaster's monthly. 东成EHS also leads on iOS requirement (12.0 vs 15.6). 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.

iMaster ships an update monthly, 东成EHS weekly. The most recent releases landed on September 18, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | iMaster | 东成EHS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Size | 45 MB | 60 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [杭州物源科技有限公司](https://appshunter.io/developer/1462638601) | [Suzhou Wenku Safety Technology Engineering Co., Ltd](https://appshunter.io/developer/1558791524) |

## What reviewers say

### iMaster

[App page](https://appshunter.io/ios/app/imaster/id1462638602)

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

**In-app purchases:** none


### 东成EHS

[App page](https://appshunter.io/ios/app/ehs/id6503337011)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iMaster free?

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

### Is 东成EHS free?

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

### Do iMaster or 东成EHS have ads?

Neither iMaster nor 东成EHS shows ads.

### Which is updated more often, iMaster or 东成EHS?

iMaster ships an update monthly, and 东成EHS weekly. Most recently, iMaster was updated on September 18, 2026 and 东成EHS on September 19, 2026.

---

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