# 工程师e家 vs 变频器之家

The clearest difference is in-app purchases: 变频器之家 at none against 工程师e家's 3. 变频器之家 also leads on ads (none vs shown) and iOS requirement (10.0 vs 13.0). On price and device support there is nothing between them.

Both are free to download. 工程师e家 sells 3 one-off in-app purchases. 变频器之家 asks for nothing beyond the download.

## The numbers

| Metric | 工程师e家 | 变频器之家 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | — |
| Size | 61 MB | 142 MB |
| Requires iOS | 13.0 | **10.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Jinan Tailing Automation Technology Co., Ltd.](https://appshunter.io/developer/1618634520) | [Hebei ZaiXun Network Technology Co., Ltd.](https://appshunter.io/developer/994393282) |

## What reviewers say

### 工程师e家

[App page](https://appshunter.io/ios/app/e/id1641033041)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 资料年会员 | $3.99 | one-time |
| 资料永久会员 | $12.99 | one-time |
| 视频永久会员 | $39.99 | one-time |


### 变频器之家

[App page](https://appshunter.io/ios/app/id1661608593)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 工程师e家 free?

工程师e家 is free to download, with in-app purchases available.

### Is 变频器之家 free?

变频器之家 is free to download, with no in-app purchases.

### Do 工程师e家 or 变频器之家 have ads?

工程师e家 shows ads; 变频器之家 does not.

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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.*