# 建築構造データブック vs DRA Viewer

The clearest difference is update cadence: DRA Viewer at every 2 months against 建築構造データブック's every 8 months. DRA Viewer also leads on device support (3 vs 1) and iOS requirement (13.0 vs 15.0). On price, ads and in-app purchases there is nothing between them.

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

建築構造データブック ships an update every 8 months, DRA Viewer every 2 months. The most recent releases landed on October 19, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | 建築構造データブック | DRA Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Size | 0 MB | 27 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [株式会社ストラクチャー](https://appshunter.io/developer/1097429252) | [株式会社建築ピボット](https://appshunter.io/developer/1450903325) |

## What reviewers say

### 建築構造データブック

[App page](https://appshunter.io/ios/app/id1097429253)

**Features:** macOS Compatibility

**In-app purchases:** none


### DRA Viewer

[App page](https://appshunter.io/ios/app/dra-viewer/id1450903326)

**In-app purchases:** none


## Frequently asked questions

### Is 建築構造データブック free?

建築構造データブック is free to download, with no in-app purchases.

### Is DRA Viewer free?

DRA Viewer is free to download, with no in-app purchases.

### Do 建築構造データブック or DRA Viewer have ads?

Neither 建築構造データブック nor DRA Viewer shows ads.

### Which is updated more often, 建築構造データブック or DRA Viewer?

建築構造データブック ships an update every 8 months, and DRA Viewer every 2 months. Most recently, 建築構造データブック was updated on October 19, 2026 and DRA Viewer on October 26, 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.*