# Arrette Scale sketch drafting vs Onshape 3D CAD

The clearest difference is price: Onshape 3D CAD at Free against Arrette Scale sketch drafting's $8.99. Onshape 3D CAD also leads on rating (3.5 vs 2.6) and update cadence (every 3 weeks vs every 3 months). Arrette Scale sketch drafting's advantage is review sentiment (60% vs 47%) and iOS requirement (12.4 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

Onshape 3D CAD 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.

Onshape 3D CAD holds the better App Store score, 3.5 against 2.6. That said, the two scores are not equally well evidenced: Onshape 3D CAD has 417 ratings behind it against 14, so its average is the more settled of the two. Written reviews complicate that: 60% of Arrette Scale sketch drafting's written reviews are positive against 47% of Onshape 3D CAD's, so the app with the better star average is not the one people write more warmly about.

Arrette Scale sketch drafting ships an update every 3 months, Onshape 3D CAD every 3 weeks. The most recent releases landed on October 29, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Arrette Scale sketch drafting | Onshape 3D CAD |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | [2.6 (14 ratings)](https://appshunter.io/ios/app/arrette-scale-sketch-drafting/id730151020/reviews) | **[3.5 (417 ratings)](https://appshunter.io/ios/app/onshape-3d-cad/id923421284/reviews)** |
| Number of ratings | 14 | **417** |
| Positive reviews | **60.0% of reviews** | 47.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 53 MB | 77 MB |
| Requires iOS | **12.4** | 18.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Arrette, Inc.](https://appshunter.io/developer/730151023) | [PTC Inc.](https://appshunter.io/developer/501201404) |

## What reviewers say

### 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


### Onshape 3D CAD

[App page](https://appshunter.io/ios/app/onshape-3d-cad/id923421284)

This professional CAD platform enables real-time collaboration on product design from any device. It offers parametric modeling tools, secure cloud storage, and version control, streamlining the design process for teams and individuals. Supports students and educators with free access for non-commercial projects.

**Highlights:** Parametric modeling tools, Real-time team collaboration, Cloud-based data management, Cross-device access, Version control and history, Commenting and feedback tools

**In-app purchases:** none

**What reviewers like**

- 🚀 Powerful CAD features
- 🌐 Accessible from any device
- 👍 Intuitive interface
- 💡 Great for on-site work
- 🌟 Exceptional for a free app

**What reviewers complain about**

- 🐛 Crashes and stability issues
- 👎 Unintuitive and clunky UI
- 🔒 Requires account sign-up
- 💰 Expensive paid plans
- 🔍 Difficult to find/use key features

**Reported bugs**

- Frequent crashes and freezes
- Dimensions not visible/editable
- Rotation/view controls unreliable
- Unable to create account
- Incompatible with older devices

**Requested features**

- Add keyboard shortcuts
- Improve dimensioning tools
- Allow private file storage
- Optimize for iPad/Apple Pencil
- Provide better documentation/tutorials


## Frequently asked questions

### Is Arrette Scale sketch drafting free?

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

### Is Onshape 3D CAD free?

Onshape 3D CAD is free to download, with no in-app purchases.

### Which has better reviews, Arrette Scale sketch drafting or Onshape 3D CAD?

Onshape 3D CAD is rated higher. Arrette Scale sketch drafting averages 2.6 out of 5 from 14 ratings, while Onshape 3D CAD averages 3.5 from 417 ratings.

### Do Arrette Scale sketch drafting or Onshape 3D CAD have ads?

Neither Arrette Scale sketch drafting nor Onshape 3D CAD shows ads.

### Which is updated more often, Arrette Scale sketch drafting or Onshape 3D CAD?

Arrette Scale sketch drafting ships an update every 3 months, and Onshape 3D CAD every 3 weeks. Most recently, Arrette Scale sketch drafting was updated on October 29, 2026 and Onshape 3D CAD on November 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.*