# 结构大师HD vs Sketch Viewer UP

The clearest difference is rating: 结构大师HD at 2.0 against Sketch Viewer UP's 1.6. 结构大师HD also leads on iOS requirement (9.0 vs 13.0). Sketch Viewer UP's advantage is update cadence (every 8 days vs every 2 months) and ratings volume (10 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. 结构大师HD sells 4 one-off in-app purchases and Sketch Viewer UP sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

结构大师HD holds the better App Store score, 2.0 against 1.6. That said, the two scores are not equally well evidenced: Sketch Viewer UP has 10 ratings behind it against 1, so its average is the more settled of the two.

结构大师HD ships an update every 2 months, Sketch Viewer UP every 8 days. The most recent releases landed on October 6, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 结构大师HD | Sketch Viewer UP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/hd/id1059035629/reviews)** | [1.6 (10 ratings)](https://appshunter.io/ios/app/sketch-viewer-up-model-browser/id6447847214/reviews) |
| Number of ratings | 1 | **10** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 8 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 102 MB | 40 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [颖达 陈](https://appshunter.io/developer/1058507663) | [骁宇 陈](https://appshunter.io/developer/1836429187) |

## What reviewers say

### 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 |


### Sketch Viewer UP

[App page](https://appshunter.io/ios/app/sketch-viewer-up-model-browser/id6447847214)

This application allows users to import and view 3D models from various professional design software. It supports a wide range of file formats, making it convenient for designers, engineers, and students to access and analyze 3D drawings on their mobile devices.

**Highlights:** Import and view 3D drawings, Supports multiple professional 3D file formats, Collection of standard industry libraries, Mobile 3D viewing software, Professional CAD drawing and modeling

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一季度会员 | $9.99 | one-time |
| 一年会员 | $24.99 | one-time |
| 永久会员 | $29.99 | one-time |


## Frequently asked questions

### Is 结构大师HD free?

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

### Is Sketch Viewer UP free?

Sketch Viewer UP is free to download, with in-app purchases available.

### Which has better reviews, 结构大师HD or Sketch Viewer UP?

结构大师HD is rated higher. 结构大师HD averages 2.0 out of 5 from 1 ratings, while Sketch Viewer UP averages 1.6 from 10 ratings.

### Do 结构大师HD or Sketch Viewer UP have ads?

Neither 结构大师HD nor Sketch Viewer UP shows ads.

### Which is updated more often, 结构大师HD or Sketch Viewer UP?

结构大师HD ships an update every 2 months, and Sketch Viewer UP every 8 days. Most recently, 结构大师HD was updated on October 6, 2026 and Sketch Viewer UP on October 24, 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.*