# 管道焊接 vs 管道计算器Pro

The clearest difference is in-app purchases: 管道焊接 at none against 管道计算器Pro's 3. 管道计算器Pro's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 管道计算器Pro sells 3 one-off in-app purchases. 管道焊接 asks for nothing beyond the download.

管道焊接 ships an update every 2 months, 管道计算器Pro every 2 weeks. The most recent releases landed on September 8, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | 管道焊接 | 管道计算器Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 96 MB | 52 MB |
| Requires iOS | 14.1 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [仁良 孙](https://appshunter.io/developer/1454466801) | [ChenShu Zhuang](https://appshunter.io/developer/1477949813) |

## What reviewers say

### 管道焊接

[App page](https://appshunter.io/ios/app/id1543863475)

**Features:** macOS Compatibility

**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 管道焊接 free?

管道焊接 is free to download, 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 管道焊接 or 管道计算器Pro have ads?

Neither 管道焊接 nor 管道计算器Pro shows ads.

### Which is updated more often, 管道焊接 or 管道计算器Pro?

管道焊接 ships an update every 2 months, and 管道计算器Pro every 2 weeks. Most recently, 管道焊接 was updated on September 8, 2026 and 管道计算器Pro on September 28, 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.*