Comparison

3D Scratchpad vs KiCAD Schematic Viewer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

3D Scratchpad

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
Read full description

3D Scratchpad is an easy-to-use, full-featured design tool for creating 3D models. Freehand draw in three dimensions using simple primitive solid shapes and intuitive gestures. Manipulate objects as if they were in the real world with augmented reality, and share your models as .usdz files for viewing in augmented reality. 3D Scratchpad creates a short path between design ideas and useful 3D models for designers, modelers, makers, gamers, 3D-printing enthusiasts, hobbyists, educators, engineers, and architects. Use 3D Scratchpad to create and fabricate prototypes, to model new products, parts, and structures, and to create and share 3D art and designs. 3D Scratchpad enables you to design in the real world. Built to enable immersive, intuitive, and interactive design, 3D Scratchpad unlocks your design creativity and gives you the tools you need to create and share 3D models. Purchasing an auto-renewing 3D Scratchpad Subscription enables the ability to save and share 3D models.

About

KiCAD Schematic Viewer

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
Read full description

This is a lightweight APP for viewing KiCAD generated schematic files in a mobile environment. No matter what questions, opinions or ideas you have, you can send an email to xjerry248@gmail.com. KiCAD Schematic Viewer is a highly professional tool developed specifically for viewing and reviewing schematic design files generated by KiCAD. The tool integrates an advanced graphical interface that allows users to deeply browse schematic designs in a single-layer view mode, supporting comprehensive analysis and verification of complex schematics. Users can view the component layout, electrical connections, and signal paths in detail, and perform interactive design verification and troubleshooting. KiCAD Schematic Viewer provides real-time zoom, pan, and rotation capabilities, enabling users to precisely locate and inspect every detail of the schematic. At the same time, the tool supports various display modes, including transparent view, high brightness display, and contrast enhancement, helping users to quickly identify and solve potential problems. You can access the Web interface of the APP directly in the browser, easily manage, upload, and download the schematic design file generated by KiCAD, and achieve cross-platform convenient and efficient file operation. KiCAD Schematic Viewer provides engineers with comprehensive support to ensure high quality, reliability, and manufacturability of schematic designs, whether at the beginning of design, mid-development, or final review before production. By using KiCAD Schematic Viewer, engineers can more efficiently perform design verification, optimization, and fault diagnosis, improving overall design efficiency and product quality. KiCAD Schematic Viewer supports the Model Context Protocol (MCP). Through this protocol, it can provide AI models with the necessary context from schematic files to enhance circuit schematic analysis. Engineers can connect KiCAD Schematic Viewer with AI - driven functions like automated design analysis and intelligent verification. This allows them to more effectively identify potential schematic design issues and improve the overall quality of their schematic designs.

Screenshots

3D Scratchpad4 screens
KiCAD Schematic Viewer4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

3D Scratchpad ships an update every 15 months, KiCAD Schematic Viewer every 11 days. The most recent releases landed on September 22, 2026 and September 27, 2026 respectively.

Scorecard7 real differences · 4 level
3D Scratchpad versus KiCAD Schematic Viewer: the parameters behind the verdict, then further details
Parameter3D ScratchpadKiCAD Schematic Viewer
PriceFree — better$2.99
Rating2.7 (12 ratings) — better—
Positive reviews18.5% of reviews — better0.0% of reviews
Number of ratings12 — better—
Update frequencyEvery 15 monthsEvery 11 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
Best chart rank—#61 — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.013.0 — better
Further details — not scored
Size7 MB8 MB
Age rating4+4+
DeveloperEngineered Stuff明杰 曾

Customer experience

3D Scratchpad

All ratings12 ratings
Positive41.7%
Neutral0.0%
Negative58.3%
Written reviews27 reviews
Positive18.5%
Neutral7.4%
Negative74.1%

KiCAD Schematic Viewer

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

3 purchases

3D Scratchpad

Subscriptions3
  • One Month Subscription$1.991 Month
  • Six Month Subscription$6.996 Months
  • One Year Subscription$9.991 Year
None

KiCAD Schematic Viewer

No in-app purchases

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 September 22, 2026 and KiCAD Schematic Viewer on September 27, 2026.

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