# 风管计算器 vs 管道计算器Pro

The clearest difference is update cadence: 风管计算器 at every 4 days against 管道计算器Pro's every 9 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 风管计算器 sells 4 in-app purchases, starting at $0.99 per month and 管道计算器Pro sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

风管计算器 ships an update every 4 days, 管道计算器Pro every 9 days. The most recent releases landed on October 3, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 风管计算器 | 管道计算器Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 9 days |
| Size | 62 MB | 53 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [强 余](https://appshunter.io/developer/1116393375) | [ChenShu Zhuang](https://appshunter.io/developer/1477949813) |

## What reviewers say

### 风管计算器

[App page](https://appshunter.io/ios/app/id6757332165)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HVAC_1_Month | $0.99 | per month |
| HVAC_3_Month | $1.99 | per 3 months |
| HVAC_6_Month | $3.99 | per 6 months |
| HVAC_1_Year | $5.99 | per year |


### 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 风管计算器 free?

风管计算器 is free to download, with in-app purchases available.

### Is 管道计算器Pro free?

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

### Do 风管计算器 or 管道计算器Pro have ads?

Neither 风管计算器 nor 管道计算器Pro shows ads.

### Which is updated more often, 风管计算器 or 管道计算器Pro?

风管计算器 ships an update every 4 days, and 管道计算器Pro every 9 days. Most recently, 风管计算器 was updated on October 3, 2026 and 管道计算器Pro on October 14, 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.*