# 云装天下 vs 结构大师HD

The clearest difference is in-app purchases: 云装天下 at none against 结构大师HD's 4. 云装天下 also leads on update cadence (every 2 weeks vs every 2 months) and device support (3 vs 1). 结构大师HD's advantage is iOS requirement (9.0 vs 13). On price and ads there is nothing between them.

Both are free to download. 结构大师HD sells 4 one-off in-app purchases. 云装天下 asks for nothing beyond the download.

云装天下 ships an update every 2 weeks, 结构大师HD every 2 months. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 云装天下 | 结构大师HD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/hd/id1059035629/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 185 MB | 102 MB |
| Requires iOS | 13 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 17+ | 4+ |
| Developer | [Cloud Cubic Network Co., Ltd.](https://appshunter.io/developer/952643703) | [颖达 陈](https://appshunter.io/developer/1058507663) |

## What reviewers say

### 云装天下

[App page](https://appshunter.io/ios/app/id952643704)

**In-app purchases:** none


### 结构大师HD

[App page](https://appshunter.io/ios/app/hd/id1059035629)

This app provides structural analysis and mechanics calculations for structural engineers and field engineers on tablets. It offers advanced features like internal force diagrams, dynamics, influence lines, and AI-powered step-by-step solutions for various methods. The VIP version unlocks additional engineering modules, customization options, and reporting capabilities.

**Highlights:** Convenient modeling with touch input, Internal force diagrams and dynamics, AI-powered step-by-step solutions, Support for structural design and large structures, VIP features: engineering modules, custom sections, dark theme, Cross-platform compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 打赏 | $1.99 | one-time |
| 高级功能购买 | $3.99 | one-time |
| 解锁当前版本SMHD | $19.99 | one-time |
| 解锁全版本 | $24.99 | one-time |


## Frequently asked questions

### Is 云装天下 free?

云装天下 is free to download, with no in-app purchases.

### Is 结构大师HD free?

结构大师HD is free to download, with in-app purchases available.

### Do 云装天下 or 结构大师HD have ads?

Neither 云装天下 nor 结构大师HD shows ads.

### Which is updated more often, 云装天下 or 结构大师HD?

云装天下 ships an update every 2 weeks, and 结构大师HD every 2 months. Most recently, 云装天下 was updated on October 24, 2026 and 结构大师HD on October 6, 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.*