# 钢结构设计工具箱 vs PDF Factory Plus

The clearest difference is price: PDF Factory Plus at Free against 钢结构设计工具箱's $12.99. 钢结构设计工具箱's advantage is in-app purchases (none vs 1) and update cadence (every 6 months vs every 26 months). On ads and device support there is nothing between them.

PDF Factory Plus is free to download; 钢结构设计工具箱 costs $12.99 up front. PDF Factory Plus sells 1 one-off in-app purchase. 钢结构设计工具箱 asks for nothing beyond the download.

钢结构设计工具箱 ships an update every 6 months, PDF Factory Plus every 26 months. The most recent releases landed on October 5, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | 钢结构设计工具箱 | PDF Factory Plus |
| --- | --- | --- |
| Price | $12.99 | **Free** |
| Rating | — | **[4.7 (10 ratings)](https://appshunter.io/ios/app/pdf-factory-plus/id1663406658/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 26 months |
| Monetization | — | Free with in-app purchases |
| Size | 19 MB | 61 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [疆 边](https://appshunter.io/developer/1124320934) | [路 张](https://appshunter.io/developer/562716999) |

## What reviewers say

### 钢结构设计工具箱

[App page](https://appshunter.io/ios/app/id1232998791)

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

**In-app purchases:** none


### PDF Factory Plus

[App page](https://appshunter.io/ios/app/pdf-factory-plus/id1663406658)

This app offers a comprehensive suite of local PDF processing tools, ensuring your files remain secure and private. It provides intuitive features for editing, converting, merging, and protecting PDF documents without requiring an internet connection or account creation.

**Highlights:** Local PDF processing for enhanced security, Password protection and decryption, Page deletion and extraction, Merge multiple PDFs, Image and XPS to PDF conversion, PDF repair and linearization, PDF to scanned file conversion

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF Factory Plus | Free | one-time |


## Frequently asked questions

### Is 钢结构设计工具箱 free?

钢结构设计工具箱 costs $12.99, with no in-app purchases.

### Is PDF Factory Plus free?

PDF Factory Plus is free to download, with in-app purchases available.

### Do 钢结构设计工具箱 or PDF Factory Plus have ads?

Neither 钢结构设计工具箱 nor PDF Factory Plus shows ads.

### Which is updated more often, 钢结构设计工具箱 or PDF Factory Plus?

钢结构设计工具箱 ships an update every 6 months, and PDF Factory Plus every 26 months. Most recently, 钢结构设计工具箱 was updated on October 5, 2026 and PDF Factory Plus on October 2, 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.*