# 防火設備自動計算 vs ダクト計算 Pro－風量・静圧・ダクト径

The clearest difference is in-app purchases: 防火設備自動計算 at none against ダクト計算 Pro－風量・静圧・ダクト径's 5. ダクト計算 Pro－風量・静圧・ダクト径's advantage is update cadence (every 9 days vs every 17 months) and iOS requirement (15.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. ダクト計算 Pro－風量・静圧・ダクト径 sells 5 in-app purchases, starting at $0.99 per month. 防火設備自動計算 asks for nothing beyond the download.

防火設備自動計算 ships an update every 17 months, ダクト計算 Pro－風量・静圧・ダクト径 every 9 days. The most recent releases landed on November 8, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | 防火設備自動計算 | ダクト計算 Pro－風量・静圧・ダクト径 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 9 days** |
| Size | 3 MB | 29 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [moriyama ryu](https://appshunter.io/developer/1779009972) | [Gun woo Kim](https://appshunter.io/developer/1700263119) |

## What reviewers say

### 防火設備自動計算

[App page](https://appshunter.io/ios/app/id6738035065)

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

**In-app purchases:** none


### ダクト計算 Pro－風量・静圧・ダクト径

[App page](https://appshunter.io/ios/app/pro/id6791592927)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.99 | per month |
| Pro Yearly | $9.99 | per year |
| Lifetime Pro · Supporter I | $29.99 | one-time |
| Lifetime Pro · Supporter II | $39.99 | one-time |
| Lifetime Pro · Supporter III | $59.99 | one-time |


## Frequently asked questions

### Is 防火設備自動計算 free?

防火設備自動計算 is free to download, with no in-app purchases.

### Is ダクト計算 Pro－風量・静圧・ダクト径 free?

ダクト計算 Pro－風量・静圧・ダクト径 is free to download, with in-app purchases available.

### Do 防火設備自動計算 or ダクト計算 Pro－風量・静圧・ダクト径 have ads?

Neither 防火設備自動計算 nor ダクト計算 Pro－風量・静圧・ダクト径 shows ads.

### Which is updated more often, 防火設備自動計算 or ダクト計算 Pro－風量・静圧・ダクト径?

防火設備自動計算 ships an update every 17 months, and ダクト計算 Pro－風量・静圧・ダクト径 every 9 days. Most recently, 防火設備自動計算 was updated on November 8, 2026 and ダクト計算 Pro－風量・静圧・ダクト径 on November 10, 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.*