# DuctChecker vs 建築設備簡易計算アプリ

The clearest difference is price: 建築設備簡易計算アプリ at Free against DuctChecker's $6.99. 建築設備簡易計算アプリ also leads on review sentiment (33% vs 0%) and update cadence (every 2 weeks vs every 4 months). DuctChecker's advantage is in-app purchases (none vs 2) and iOS requirement (15.0 vs 18.2). On ads and device support there is nothing between them.

建築設備簡易計算アプリ is free to download; DuctChecker costs $6.99 up front. 建築設備簡易計算アプリ sells 2 one-off in-app purchases. DuctChecker asks for nothing beyond the download.

DuctChecker ships an update every 4 months, 建築設備簡易計算アプリ every 2 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | DuctChecker | 建築設備簡易計算アプリ |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Positive reviews | 0.0% of reviews | **33.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 23 MB | 9 MB |
| Requires iOS | **15.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AIR DESIGN, INC.](https://appshunter.io/developer/923430781) | [koichi hashimoto](https://appshunter.io/developer/1659408789) |

## 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


### 建築設備簡易計算アプリ

[App page](https://appshunter.io/ios/app/id1659408787)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告を非表示にする | $2.99 | one-time |
| プレミアム機能（広告削除含む） | $5.99 | one-time |


## Frequently asked questions

### Is DuctChecker free?

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

### Is 建築設備簡易計算アプリ free?

建築設備簡易計算アプリ is free to download, with in-app purchases available.

### Do DuctChecker or 建築設備簡易計算アプリ have ads?

Neither DuctChecker nor 建築設備簡易計算アプリ shows ads.

### Which is updated more often, DuctChecker or 建築設備簡易計算アプリ?

DuctChecker ships an update every 4 months, and 建築設備簡易計算アプリ every 2 weeks. Most recently, DuctChecker was updated on November 1, 2026 and 建築設備簡易計算アプリ on November 3, 2026.

---

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