# DuctChecker vs ダクト圧損計算Pro

The clearest difference is price: ダクト圧損計算Pro at Free against DuctChecker's $6.99. DuctChecker's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

ダクト圧損計算Pro is free to download; DuctChecker costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | DuctChecker | ダクト圧損計算Pro |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | — |
| Monetization | Paid | — |
| Size | 23 MB | 35 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AIR DESIGN, INC.](https://appshunter.io/developer/923430781) | [takesi shutou](https://appshunter.io/developer/6778977894) |

## What reviewers say

### DuctChecker

[App page](https://appshunter.io/ios/app/ductchecker/id933593987)

Easily calculate duct dimensions using various engineering methods like constant pressure, static pressure regain, total pressure, and velocity. This tool simplifies complex duct design calculations, typically found in flow diagrams or slide rules.

**Highlights:** Constant pressure method calculation, Static pressure regain method, Total pressure method, Velocity method, Duct dimension determination, Simplified duct design

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

**In-app purchases:** none


### ダクト圧損計算Pro

[App page](https://appshunter.io/ios/app/pro/id6797879580)

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

**In-app purchases:** none


## Frequently asked questions

### Is DuctChecker free?

DuctChecker costs $6.99, with no in-app purchases.

### Is ダクト圧損計算Pro free?

ダクト圧損計算Pro is free to download, with no in-app purchases.

### Do DuctChecker or ダクト圧損計算Pro have ads?

ダクト圧損計算Pro shows ads; DuctChecker does not.

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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.*