# 管道计算器Pro vs PipefitterAssistant

The clearest difference is price: 管道计算器Pro at Free against PipefitterAssistant's $2.99. 管道计算器Pro also leads on iOS requirement (13.0 vs 16.6). PipefitterAssistant'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; PipefitterAssistant costs $2.99 up front. 管道计算器Pro sells 3 one-off in-app purchases. PipefitterAssistant asks for nothing beyond the download.

## The numbers

| Metric | 管道计算器Pro | PipefitterAssistant |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Size | 52 MB | 7 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ChenShu Zhuang](https://appshunter.io/developer/1477949813) | [小燕 陈](https://appshunter.io/developer/1462872555) |

## What reviewers say

### 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 |


### PipefitterAssistant

[App page](https://appshunter.io/ios/app/pipefitterassistant/id6791213804)

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

**In-app purchases:** none


## Frequently asked questions

### Is 管道计算器Pro free?

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

### Is PipefitterAssistant free?

PipefitterAssistant costs $2.99, with no in-app purchases.

### Do 管道计算器Pro or PipefitterAssistant have ads?

Neither 管道计算器Pro nor PipefitterAssistant 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.*