# 画门窗Pro vs Sketch Viewer UP

The clearest difference is in-app purchases: 画门窗Pro at none against Sketch Viewer UP's 3. Sketch Viewer UP's advantage is update cadence (every 9 days vs every 9 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sketch Viewer UP sells 3 one-off in-app purchases. 画门窗Pro asks for nothing beyond the download.

画门窗Pro ships an update every 9 months, Sketch Viewer UP every 9 days. The most recent releases landed on September 15, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | 画门窗Pro | Sketch Viewer UP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.6 (10 ratings)](https://appshunter.io/ios/app/sketch-viewer-up-model-browser/id6447847214/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 9 days** |
| Monetization | — | Free with in-app purchases |
| Size | 40 MB | 40 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [强 文](https://appshunter.io/developer/674834521) | [骁宇 陈](https://appshunter.io/developer/1836429187) |

## What reviewers say

### 画门窗Pro

[App page](https://appshunter.io/ios/app/pro/id6446976815)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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

**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 画门窗Pro free?

画门窗Pro is free to download, with no in-app purchases.

### Is Sketch Viewer UP free?

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

### Do 画门窗Pro or Sketch Viewer UP have ads?

Neither 画门窗Pro nor Sketch Viewer UP shows ads.

### Which is updated more often, 画门窗Pro or Sketch Viewer UP?

画门窗Pro ships an update every 9 months, and Sketch Viewer UP every 9 days. Most recently, 画门窗Pro was updated on September 15, 2026 and Sketch Viewer UP on June 1, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*