# DuctSizeCalc 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 DuctSizeCalc's $2.99. DuctSizeCalc's advantage is ads (none vs shown) and iOS requirement (9.0 vs 15.1). On in-app purchases and device support there is nothing between them.

ダクト圧損計算Pro is free to download; DuctSizeCalc costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | DuctSizeCalc | ダクト圧損計算Pro |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/ductsizecalc/id458032972/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 58 months | — |
| Monetization | Paid | — |
| Size | 2 MB | 35 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Technical Data Service Co.,Ltd.](https://appshunter.io/developer/441746798) | [takesi shutou](https://appshunter.io/developer/6778977894) |

## What reviewers say

### DuctSizeCalc

[App page](https://appshunter.io/ios/app/ductsizecalc/id458032972)

Easily calculate duct sizes for air conditioning systems using the constant-pressure method. Input wind volume and tap calculate to determine duct dimensions, pressure, and wind velocity. Useful for blueprints, working drawings, and on-site applications.

**Highlights:** Constant-pressure method duct sizing, Input wind volume for calculation, Supports rectangular and circular ducts, Adjustable friction loss and wind velocity, Automatic height adjustment for WxH interlock, Metric system calculations

**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 DuctSizeCalc free?

DuctSizeCalc costs $2.99, 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 DuctSizeCalc or ダクト圧損計算Pro have ads?

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

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*