# 车工计算器 vs Piping Worker

The clearest difference is price: 车工计算器 at Free against Piping Worker's $2.99. 车工计算器 also leads on iOS requirement (13.0 vs 16.6). Piping Worker's advantage is in-app purchases (none vs 3). On ads and device support there is nothing between them.

车工计算器 is free to download; Piping Worker costs $2.99 up front. 车工计算器 sells 3 one-off in-app purchases. Piping Worker asks for nothing beyond the download.

## The numbers

| Metric | 车工计算器 | Piping Worker |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Size | 34 MB | 10 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [钱威 武](https://appshunter.io/developer/1600415425) | [小燕 陈](https://appshunter.io/developer/1462872555) |

## What reviewers say

### 车工计算器

[App page](https://appshunter.io/ios/app/id1616124777)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一年会员 | $8.99 | one-time |
| 二年会员 | $14.99 | one-time |
| 三年会员 | $19.99 | one-time |


### Piping Worker

[App page](https://appshunter.io/ios/app/piping-worker/id6795559829)

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

**In-app purchases:** none


## Frequently asked questions

### Is 车工计算器 free?

车工计算器 is free to download, with in-app purchases available.

### Is Piping Worker free?

Piping Worker costs $2.99, with no in-app purchases.

### Do 车工计算器 or Piping Worker have ads?

Neither 车工计算器 nor Piping Worker 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.*