# 塑胶工业 vs echOS

The clearest difference is in-app purchases: echOS at none against 塑胶工业's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 塑胶工业 sells 3 one-off in-app purchases. echOS asks for nothing beyond the download.

塑胶工业 ships an update weekly, echOS fortnightly. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 塑胶工业 | echOS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Size | 82 MB | 227 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Guangzhou Jiangwaijiang Information Technology Co., Ltd](https://appshunter.io/developer/991795069) | [Echronos Digital Technology (Shenzhen) Co., Ltd.](https://appshunter.io/developer/1536141167) |

## What reviewers say

### 塑胶工业

[App page](https://appshunter.io/ios/app/id1488051796)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SVIP1 | $0.99 | one-time |
| SVIP88 | $12.99 | one-time |
| SVIP128 | $19.99 | one-time |


### echOS

[App page](https://appshunter.io/ios/app/echos/id1536317919)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 塑胶工业 free?

塑胶工业 is free to download, with in-app purchases available.

### Is echOS free?

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

### Do 塑胶工业 or echOS have ads?

Neither 塑胶工业 nor echOS shows ads.

### Which is updated more often, 塑胶工业 or echOS?

塑胶工业 ships an update weekly, and echOS fortnightly. Most recently, 塑胶工业 was updated on October 29, 2026 and echOS on October 27, 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.*