# AirDiffuser vs 空気状態の計算

The clearest difference is price: 空気状態の計算 at Free against AirDiffuser's $2.99. AirDiffuser's advantage is in-app purchases (none vs 2) and device support.

空気状態の計算 is free to download; AirDiffuser costs $2.99 up front. 空気状態の計算 sells 2 in-app purchases, starting at $0.49 per month. AirDiffuser asks for nothing beyond the download.

## The numbers

| Metric | AirDiffuser | 空気状態の計算 |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/airdiffuser/id441746795/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Update frequency | Every 60 months | — |
| Monetization | Paid | — |
| Size | 4 MB | 1 MB |
| Requires iOS | **9.0** | 17.4 |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 17+ |
| Developer | [Technical Data Service Co.,Ltd.](https://appshunter.io/developer/441746798) | [Sho Akita](https://appshunter.io/developer/1743635853) |

## 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


### 空気状態の計算

[App page](https://appshunter.io/ios/app/id6504130643)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1ヶ月利用 -アプリ内の計算ツールの利用権- | $0.49 | per month |
| 1年間利用 -アプリ内の計算ツールの利用権- | $4.99 | per year |


## Frequently asked questions

### Is AirDiffuser free?

AirDiffuser costs $2.99, with no in-app purchases.

### Is 空気状態の計算 free?

空気状態の計算 is free to download, with in-app purchases available.

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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.*