# Deflection Lite vs 结构设计工具箱

The clearest difference is in-app purchases: Deflection Lite at none against 结构设计工具箱's 3. Deflection Lite also leads on ads (none vs shown). 结构设计工具箱's advantage is review sentiment (60% vs 44%). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. 结构设计工具箱 sells 3 in-app purchases, starting at $3.99 per month. Deflection Lite asks for nothing beyond the download.

Deflection Lite ships an update every 3 months, 结构设计工具箱 every 4 months. The most recent releases landed on September 17, 2026 and August 30, 2026 respectively.

## The numbers

| Metric | Deflection Lite | 结构设计工具箱 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (46 ratings)](https://appshunter.io/ios/app/deflection-lite/id974474071/reviews)** | — |
| Number of ratings | **46** | — |
| Positive reviews | 44.4% of reviews | **60.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Paid | — |
| Size | 108 MB | 16 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Blue Ketchep](https://appshunter.io/developer/1131834248) | [疆 边](https://appshunter.io/developer/1124320934) |

## What reviewers say

### Deflection Lite

[App page](https://appshunter.io/ios/app/deflection-lite/id974474071)

This app provides interactive and precise structural beam analysis. Easily visualize beam bending by dragging loads and supports, and calculate key engineering results like reactions, shear force, and bending moment.

**Highlights:** Interactive beam bending visualization, Calculate reactions, shear force, and bending moment, Built-in cross-section databases, Unlimited loads and supports, Export design to shareable permalink, Metric and standard units

**Features:** Vision Pro support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Deflection Lite free?

Deflection Lite is free to download, with no in-app purchases.

### 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.

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

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

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

Deflection Lite ships an update every 3 months, and 结构设计工具箱 every 4 months. Most recently, Deflection Lite was updated on September 17, 2026 and 结构设计工具箱 on August 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.*