# 3D Scratchpad vs CAD Smart Modeling

The clearest difference is rating: CAD Smart Modeling at 3.5 against 3D Scratchpad's 2.7. CAD Smart Modeling also leads on update cadence (every 5 months vs every 15 months) and device support (4 vs 2). 3D Scratchpad's advantage is ads (none vs shown) and review sentiment (19% vs 0%). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. 3D Scratchpad sells 3 in-app purchases, starting at $1.99 per month and CAD Smart Modeling sells 7 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

CAD Smart Modeling holds the better App Store score, 3.5 against 2.7. Both are backed by a comparable volume of ratings — 12 and 8 respectively. Written reviews complicate that: 19% of 3D Scratchpad's written reviews are positive against 0% of CAD Smart Modeling's, so the app with the better star average is not the one people write more warmly about.

3D Scratchpad ships an update every 15 months, CAD Smart Modeling every 5 months. The most recent releases landed on September 22, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | 3D Scratchpad | CAD Smart Modeling |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (12 ratings)](https://appshunter.io/ios/app/3d-scratchpad/id957422439/reviews) | **[3.5 (8 ratings)](https://appshunter.io/ios/app/cad-smart-modeling-3d-cad/id6476608505/reviews)** |
| Number of ratings | **12** | 8 |
| Positive reviews | **18.5% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 15 months | **Every 5 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 7 MB | 440 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Engineered Stuff](https://appshunter.io/developer/383720996) | [Sebastian Kemper](https://appshunter.io/developer/1513694925) |

## What reviewers say

### 3D Scratchpad

[App page](https://appshunter.io/ios/app/3d-scratchpad/id957422439)

Create 3D models with a user-friendly design tool. Freehand draw in 3D using primitive shapes and gestures. Manipulate objects with augmented reality and share your creations as .usdz files.

**Highlights:** Freehand 3D drawing, Primitive solid shapes, Intuitive gestures, Augmented reality manipulation, Share as .usdz files

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Month Subscription | $1.99 | per month |
| Six Month Subscription | $6.99 | per 6 months |
| One Year Subscription | $9.99 | per year |


### CAD Smart Modeling

[App page](https://appshunter.io/ios/app/cad-smart-modeling-3d-cad/id6476608505)

Create detailed 3D models, technical drawings, and digital prototypes on your mobile device. This versatile CAD app is suitable for architecture, product design, engineering, and 3D printing, offering intuitive tools for both beginners and professionals.

**Highlights:** 3D Modeling & CAD Design, Technical Drawing, Precise Geometric Constructions, Import & Export of CAD and 3D Files, Product Design & Prototyping, 3D Models for Architecture & 3D Printing

**Features:** Family Sharing, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium access | $3.99 | per month |
| Premium access | $8.99 | per month |
| Premium access | $22.99 | per year |
| Premium access | $44.99 | per year |
| Pro Version | $44.99 | per year |
| Premium Access | $44.99 | one-time |
| Premium Access | $89.99 | one-time |


## Frequently asked questions

### Is 3D Scratchpad free?

3D Scratchpad is free to download, with in-app purchases available.

### Is CAD Smart Modeling free?

CAD Smart Modeling is free to download, with in-app purchases available.

### Which has better reviews, 3D Scratchpad or CAD Smart Modeling?

CAD Smart Modeling is rated higher. 3D Scratchpad averages 2.7 out of 5 from 12 ratings, while CAD Smart Modeling averages 3.5 from 8 ratings.

### Do 3D Scratchpad or CAD Smart Modeling have ads?

CAD Smart Modeling shows ads; 3D Scratchpad does not.

### Which is updated more often, 3D Scratchpad or CAD Smart Modeling?

3D Scratchpad ships an update every 15 months, and CAD Smart Modeling every 5 months. Most recently, 3D Scratchpad was updated on September 22, 2026 and CAD Smart Modeling on September 9, 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.*