# 3D Scratchpad vs KiCAD Schematic Viewer

The clearest difference is price: 3D Scratchpad at Free against KiCAD Schematic Viewer's $2.99. 3D Scratchpad also leads on review sentiment (19% vs 0%). KiCAD Schematic Viewer's advantage is in-app purchases (none vs 3) and update cadence (every 11 days vs every 15 months). On ads and device support there is nothing between them.

3D Scratchpad is free to download; KiCAD Schematic Viewer costs $2.99 up front. 3D Scratchpad sells 3 in-app purchases, starting at $1.99 per month. KiCAD Schematic Viewer asks for nothing beyond the download.

3D Scratchpad ships an update every 15 months, KiCAD Schematic Viewer every 11 days. Both last shipped on October 13, 2026.

## The numbers

| Metric | 3D Scratchpad | KiCAD Schematic Viewer |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[2.7 (12 ratings)](https://appshunter.io/ios/app/3d-scratchpad/id957422439/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | **18.5% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 11 days** |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#190** |
| Size | 7 MB | 8 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Engineered Stuff](https://appshunter.io/developer/383720996) | [明杰 曾](https://appshunter.io/developer/1695506895) |

## 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 |


### KiCAD Schematic Viewer

[App page](https://appshunter.io/ios/app/kicad-schematic-viewer/id6740265241)

**Currently charting:** #190 Top Paid · Graphics & Design (US App Store)

View and analyze KiCAD schematic files on mobile. Browse component layouts, electrical connections, and signal paths with interactive tools. Supports AI-driven analysis for enhanced design verification.

**Highlights:** View KiCAD schematic files, Analyze component layout and connections, Interactive design verification, Real-time zoom, pan, and rotation, Multiple display modes, Web interface for file management, AI model integration via MCP

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 3D Scratchpad free?

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

### Is KiCAD Schematic Viewer free?

KiCAD Schematic Viewer costs $2.99, with no in-app purchases.

### Do 3D Scratchpad or KiCAD Schematic Viewer have ads?

Neither 3D Scratchpad nor KiCAD Schematic Viewer shows ads.

### Which is updated more often, 3D Scratchpad or KiCAD Schematic Viewer?

3D Scratchpad ships an update every 15 months, and KiCAD Schematic Viewer every 11 days. Most recently, 3D Scratchpad was updated on October 13, 2026 and KiCAD Schematic Viewer on October 13, 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.*