# 结构设计工具箱 vs Deflection Pro

The clearest difference is price: 结构设计工具箱 at Free against Deflection Pro's $19.99. Deflection Pro's advantage is in-app purchases (none vs 3) and ads (none vs shown). On iOS requirement there is nothing between them.

结构设计工具箱 is free to download; Deflection Pro costs $19.99 up front. 结构设计工具箱 sells 3 in-app purchases, starting at $3.99 per month. Deflection Pro asks for nothing beyond the download.

结构设计工具箱 ships an update every 4 months, Deflection Pro every 5 weeks. The most recent releases landed on August 30, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | 结构设计工具箱 | Deflection Pro |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | — | **[4.7 (16 ratings)](https://appshunter.io/ios/app/deflection-pro/id1217160203/reviews)** |
| Number of ratings | — | **16** |
| Positive reviews | 60.0% of reviews | **69.2% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | — | Paid |
| Size | 16 MB | 163 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [疆 边](https://appshunter.io/developer/1124320934) | [Blue Ketchep](https://appshunter.io/developer/1131834248) |

## What reviewers say

### 结构设计工具箱

[App page](https://appshunter.io/ios/app/id1170765643)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一个月 | $3.99 | per month |
| 一年 | $7.99 | per year |
| 完整版 | $12.99 | one-time |


### Deflection Pro

[App page](https://appshunter.io/ios/app/deflection-pro/id1217160203)

This advanced structural analysis calculator assists engineers with beam, truss, and frame design. It generates load combinations based on American and European standards and performs detailed beam column capacity checks. Results are presented intuitively, with options to export to PDF and save files.

**Highlights:** Beam, truss, and frame analysis, Load combination generation (US & EU standards), Beam column capacity checks (flexure, shear, tension, compression), Detailed design checks for various buckling types, PDF export, Save to external file

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 结构设计工具箱 free?

结构设计工具箱 is free to download, with in-app purchases available.

### Is Deflection Pro free?

Deflection Pro costs $19.99, with no in-app purchases.

### Do 结构设计工具箱 or Deflection Pro have ads?

结构设计工具箱 shows ads; Deflection Pro does not.

### Which is updated more often, 结构设计工具箱 or Deflection Pro?

结构设计工具箱 ships an update every 4 months, and Deflection Pro every 5 weeks. Most recently, 结构设计工具箱 was updated on August 30, 2026 and Deflection Pro on September 17, 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.*