# 管道计算器Pro vs Sheet Metal Master

The clearest difference is update cadence: 管道计算器Pro at every 2 weeks against Sheet Metal Master's every 5 months. 管道计算器Pro also leads on iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 管道计算器Pro sells 3 one-off in-app purchases and Sheet Metal Master sells 1 in-app purchase, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

管道计算器Pro ships an update every 2 weeks, Sheet Metal Master every 5 months. The most recent releases landed on September 28, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | 管道计算器Pro | Sheet Metal Master |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 5 months |
| Size | 52 MB | 7 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ChenShu Zhuang](https://appshunter.io/developer/1477949813) | [磊 高](https://appshunter.io/developer/1879509033) |

## 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 |


### Sheet Metal Master

[App page](https://appshunter.io/ios/app/sheet-metal-master/id6759945933)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SheetMetal Master | $4.99 | per month |


## 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 Sheet Metal Master free?

Sheet Metal Master is free to download, with in-app purchases available.

### Do 管道计算器Pro or Sheet Metal Master have ads?

Neither 管道计算器Pro nor Sheet Metal Master shows ads.

### Which is updated more often, 管道计算器Pro or Sheet Metal Master?

管道计算器Pro ships an update every 2 weeks, and Sheet Metal Master every 5 months. Most recently, 管道计算器Pro was updated on September 28, 2026 and Sheet Metal Master on September 8, 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.*