# BIMx vs Arrette Scale sketch drafting

The clearest difference is price: BIMx at Free against Arrette Scale sketch drafting's $8.99. BIMx also leads on rating (4.0 vs 2.6) and ratings volume (167 vs 14). Arrette Scale sketch drafting's advantage is iOS requirement (12.4 vs 16.0). On review sentiment, ads, in-app purchases and device support there is nothing between them.

BIMx is free to download; Arrette Scale sketch drafting costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

BIMx holds the better App Store score, 4.0 against 2.6. That said, the two scores are not equally well evidenced: BIMx has 167 ratings behind it against 14, so its average is the more settled of the two. Written reviews split almost evenly too, at 60% and 60% positive.

BIMx ships an update every 5 weeks, Arrette Scale sketch drafting every 3 months. The most recent releases landed on October 16, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | BIMx | Arrette Scale sketch drafting |
| --- | --- | --- |
| Price | **Free** | $8.99 |
| Rating | **[4.0 (167 ratings)](https://appshunter.io/ios/app/bimx/id452706864/reviews)** | [2.6 (14 ratings)](https://appshunter.io/ios/app/arrette-scale-sketch-drafting/id730151020/reviews) |
| Number of ratings | **167** | 14 |
| Positive reviews | 59.8% of reviews | **60.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 175 MB | 53 MB |
| Requires iOS | 16.0 | **12.4** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Graphisoft SE](https://appshunter.io/developer/452706867) | [Arrette, Inc.](https://appshunter.io/developer/730151023) |

## 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


### Arrette Scale sketch drafting

[App page](https://appshunter.io/ios/app/arrette-scale-sketch-drafting/id730151020)

This app allows designers to sketch freehand while maintaining precise scale, similar to vector drafting tools. It offers intuitive drawing tools and features for easy sharing and collaboration, simplifying the design process for professionals.

**Highlights:** Freehand drawing pens with vector scaling, Adjustable grid system (metric/decimal feet), Straight edge and circle edge tools, Distance and area measurement tools, Lasso tool for selection and manipulation, Layer support for organized designs, Easy sharing via email or saving to device

**In-app purchases:** none


## Frequently asked questions

### Is BIMx free?

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

### Is Arrette Scale sketch drafting free?

Arrette Scale sketch drafting costs $8.99, with no in-app purchases.

### Which has better reviews, BIMx or Arrette Scale sketch drafting?

BIMx is rated higher. BIMx averages 4.0 out of 5 from 167 ratings, while Arrette Scale sketch drafting averages 2.6 from 14 ratings.

### Do BIMx or Arrette Scale sketch drafting have ads?

Neither BIMx nor Arrette Scale sketch drafting shows ads.

### Which is updated more often, BIMx or Arrette Scale sketch drafting?

BIMx ships an update every 5 weeks, and Arrette Scale sketch drafting every 3 months. Most recently, BIMx was updated on October 16, 2026 and Arrette Scale sketch drafting on October 11, 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.*