# CLASS1 ARCHITECT 建築情報 vs 積算知の館

The clearest difference is ads: 積算知の館 at none against CLASS1 ARCHITECT 建築情報's shown. CLASS1 ARCHITECT 建築情報's advantage is iOS requirement (13.4 vs 15.1). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CLASS1 ARCHITECT 建築情報 ships an update every 3 weeks, 積算知の館 every 4 weeks. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | CLASS1 ARCHITECT 建築情報 | 積算知の館 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Monetization | Ad-supported | — |
| Size | 29 MB | 35 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [OOKABE Creations株式会社](https://appshunter.io/developer/1506556838) | [公益社団法人 日本建築積算協会](https://appshunter.io/developer/1769558850) |

## What reviewers say

### CLASS1 ARCHITECT 建築情報

[App page](https://appshunter.io/ios/app/class1-architect/id1514528001)

Discover building materials used by renowned architects and find new ones. Access information on proposals, subsidies, and new product launches. Purchase high-quality materials directly through the app.

**Highlights:** See materials used by famous architects, Access proposal and subsidy information, Discover new and featured building materials, Read in-depth articles on materials, Order building materials online

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

**In-app purchases:** none


### 積算知の館

[App page](https://appshunter.io/ios/app/yakata/id6702011189)

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

**In-app purchases:** none


## Frequently asked questions

### Is CLASS1 ARCHITECT 建築情報 free?

CLASS1 ARCHITECT 建築情報 is free to download, with no in-app purchases.

### Is 積算知の館 free?

積算知の館 is free to download, with no in-app purchases.

### Do CLASS1 ARCHITECT 建築情報 or 積算知の館 have ads?

CLASS1 ARCHITECT 建築情報 shows ads; 積算知の館 does not.

### Which is updated more often, CLASS1 ARCHITECT 建築情報 or 積算知の館?

CLASS1 ARCHITECT 建築情報 ships an update every 3 weeks, and 積算知の館 every 4 weeks. Most recently, CLASS1 ARCHITECT 建築情報 was updated on October 7, 2026 and 積算知の館 on October 9, 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.*