# 工程计算工具箱 vs 管道计算器Pro

The clearest difference is price: 管道计算器Pro at Free against 工程计算工具箱's $0.99. 管道计算器Pro also leads on iOS requirement (13.0 vs 26.2). 工程计算工具箱's advantage is in-app purchases (none vs 3). On ads and device support there is nothing between them.

管道计算器Pro is free to download; 工程计算工具箱 costs $0.99 up front. 管道计算器Pro sells 3 one-off in-app purchases. 工程计算工具箱 asks for nothing beyond the download.

## The numbers

| Metric | 工程计算工具箱 | 管道计算器Pro |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 9 days |
| Size | 10 MB | 53 MB |
| Requires iOS | 26.2 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [丙超 康](https://appshunter.io/developer/1868763431) | [ChenShu Zhuang](https://appshunter.io/developer/1477949813) |

## What reviewers say

### 工程计算工具箱

[App page](https://appshunter.io/ios/app/id6758457521)

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

**In-app purchases:** none


### 管道计算器Pro

[App page](https://appshunter.io/ios/app/pro/id6758931508)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $3.99 | one-time |
| 年度会员 | $14.99 | one-time |
| 永久会员 | $29.99 | one-time |


## Frequently asked questions

### Is 工程计算工具箱 free?

工程计算工具箱 costs $0.99, with no in-app purchases.

### Is 管道计算器Pro free?

管道计算器Pro is free to download, with in-app purchases available.

### Do 工程计算工具箱 or 管道计算器Pro have ads?

Neither 工程计算工具箱 nor 管道计算器Pro shows ads.

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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.*