# 勾配電卓 vs 建築設備簡易計算アプリ

The clearest difference is in-app purchases: 勾配電卓 at none against 建築設備簡易計算アプリ's 2. 建築設備簡易計算アプリ's advantage is update cadence (every 2 weeks vs every 45 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. 建築設備簡易計算アプリ sells 2 one-off in-app purchases. 勾配電卓 asks for nothing beyond the download.

勾配電卓 ships an update every 45 months, 建築設備簡易計算アプリ every 2 weeks. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 勾配電卓 | 建築設備簡易計算アプリ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 45 months | **Every 2 weeks** |
| Size | 1 MB | 9 MB |
| Requires iOS | **17.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takahiro Miyashita](https://appshunter.io/developer/1493701742) | [koichi hashimoto](https://appshunter.io/developer/1659408789) |

## What reviewers say

### 勾配電卓

[App page](https://appshunter.io/ios/app/1x/id1493701743)

**Features:** macOS Compatibility

**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 勾配電卓 free?

勾配電卓 is free to download, 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.

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

勾配電卓 ships an update every 45 months, and 建築設備簡易計算アプリ every 2 weeks. Most recently, 勾配電卓 was updated on October 25, 2026 and 建築設備簡易計算アプリ on October 30, 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.*