# AirDiffuser 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 AirDiffuser's $2.99. 建築設備簡易計算アプリ also leads on update cadence (every 2 weeks vs every 60 months). AirDiffuser's advantage is in-app purchases (none vs 2) and iOS requirement (9.0 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; AirDiffuser costs $2.99 up front. 建築設備簡易計算アプリ sells 2 one-off in-app purchases. AirDiffuser asks for nothing beyond the download.

AirDiffuser ships an update every 60 months, 建築設備簡易計算アプリ every 2 weeks. The most recent releases landed on September 28, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | AirDiffuser | 建築設備簡易計算アプリ |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/airdiffuser/id441746795/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 60 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 4 MB | 9 MB |
| Requires iOS | **9.0** | 18.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Technical Data Service Co.,Ltd.](https://appshunter.io/developer/441746798) | [koichi hashimoto](https://appshunter.io/developer/1659408789) |

## What reviewers say

### AirDiffuser

[App page](https://appshunter.io/ios/app/airdiffuser/id441746795)

Quickly select air ceiling diffusers for HVAC systems. Input wind amount to calculate apparatus size and wind velocity. Supports various diffuser types and customizable settings for site and meeting use.

**Highlights:** Easy apparatus size selection by wind amount input, Supports various diffuser types (Round, Square, BL, CL, etc.), Adjustable aperture rate and wind velocity, Reverse calculation of wind amount, Metric system calculations, Calculations for BL and CL round length

**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 AirDiffuser free?

AirDiffuser costs $2.99, 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 AirDiffuser or 建築設備簡易計算アプリ have ads?

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

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

AirDiffuser ships an update every 60 months, and 建築設備簡易計算アプリ every 2 weeks. Most recently, AirDiffuser was updated on September 28, 2026 and 建築設備簡易計算アプリ on October 6, 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.*