# BIMx vs Sketch Viewer UP

The clearest difference is review sentiment: BIMx at 60% against Sketch Viewer UP's 0%. BIMx also leads on rating (4.0 vs 1.6) and in-app purchases (none vs 3). Sketch Viewer UP's advantage is update cadence (every 9 days vs every 5 weeks) and iOS requirement (13.0 vs 16.0). On price, ads, monetization model and device support there is nothing between them.

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

BIMx holds the better App Store score, 4.0 against 1.6. That said, the two scores are not equally well evidenced: BIMx has 167 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 60% of BIMx's written reviews are positive against 0% of Sketch Viewer UP's.

BIMx ships an update every 5 weeks, Sketch Viewer UP every 9 days. The most recent releases landed on September 24, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | BIMx | Sketch Viewer UP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (167 ratings)](https://appshunter.io/ios/app/bimx/id452706864/reviews)** | [1.6 (10 ratings)](https://appshunter.io/ios/app/sketch-viewer-up-model-browser/id6447847214/reviews) |
| Number of ratings | **167** | 10 |
| Positive reviews | **59.8% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 175 MB | 40 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Graphisoft SE](https://appshunter.io/developer/452706867) | [骁宇 陈](https://appshunter.io/developer/1836429187) |

## What reviewers say

### BIMx

[App page](https://appshunter.io/ios/app/bimx/id452706864)

Explore and collaborate on architectural BIM projects with interactive 3D models and linked documentation. Visualize designs, access BIM data, and streamline communication between the construction site and office.

**Highlights:** Interactive 2D & 3D BIM model exploration, Linked 2D documentation and 3D views, Access BIM element data, On-site collaboration tools, Game-like 3D navigation, Real-time 3D cutaways, Measure in 3D and 2D

**In-app purchases:** none

**What reviewers like**

- 💡 Excellent BIM viewer for ArchiCAD models
- 👍 Helpful for client communication and presentations
- 🚀 Smooth and fast 3D navigation
- 🔍 Useful for on-site model viewing and collaboration

**What reviewers complain about**

- 🐛 Occasional crashes and glitches
- 🤔 Confusing user interface for beginners
- 🔒 Requires Graphisoft account and login
- 💰 Paid subscription model after free trial

**Reported bugs**

- Issues with downloading and opening models
- Compatibility problems with newer iOS versions
- Inconsistent rendering and color issues

**Requested features**

- Ability to annotate and markup models
- Support for more CAD file formats beyond ArchiCAD
- Improved camera controls and navigation
- Integration with desktop ArchiCAD software


### 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 BIMx free?

BIMx 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.

### Which has better reviews, BIMx or Sketch Viewer UP?

BIMx is rated higher. BIMx averages 4.0 out of 5 from 167 ratings, while Sketch Viewer UP averages 1.6 from 10 ratings.

### Do BIMx or Sketch Viewer UP have ads?

Neither BIMx nor Sketch Viewer UP shows ads.

### Which is updated more often, BIMx or Sketch Viewer UP?

BIMx ships an update every 5 weeks, and Sketch Viewer UP every 9 days. Most recently, BIMx was updated on September 24, 2026 and Sketch Viewer UP on June 1, 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.*