Comparison

3D Scratchpad vs SpinFire XR

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

SpinFire XR

Read full description

Bring your CAD designs to life in AR, improve decision making and get to market faster. TheoremAR enables you to visualize and interact with your 3D engineering design data in the real-world through your iPhone or iPad, whether that be from your office, a showroom, or your living room. MODES • Image tracking – Track 3D digital content against a chosen image target to place the content in a desired location. • AR Viewer – Use your environment and place 3D digital content on recognised surfaces to help visualize 3d models. • Model Tracking (target model) – Overlays the 3D digital content over an already created prototype. • Model Tracking (alternate model) – Overlays other selected content over the target model to view models within context. FEATURES • Manipulate your 3D model in the real-world by using the Manipulation box to move, rotate and revolve your model. • Scale your model to get a closer look at your design. • Hide and occlude parts and components to only see what is necessary. • Use measurement tools including point-to-point, offset and vertex snapping. • Display and review metadata for each component. • Capture screenshots of the current view of your model, mark-up your images and save to your device or server. • Enable world occlusion to see if models fit within their current space.

Screenshots

3D Scratchpad4 screens
SpinFire XR4 screens

Verdict

The call

The clearest difference is in-app purchases: SpinFire XR at none against 3D Scratchpad's 3. SpinFire XR also leads on update cadence (every 5 months vs every 15 months) and iOS requirement (13.0 vs 18.0). On price, 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

Both are free to download. 3D Scratchpad sells 3 in-app purchases, starting at $1.99 per month. SpinFire XR asks for nothing beyond the download.

UpkeepUpdate frequency

3D Scratchpad ships an update every 15 months, SpinFire XR every 5 months. The most recent releases landed on October 13, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 7 level
3D Scratchpad versus SpinFire XR: the parameters behind the verdict, then further details
Parameter3D ScratchpadSpinFire XR
PriceFreeFree
Rating2.7 (12 ratings) — better—
Positive reviews18.5% of reviews—
Number of ratings12 — better—
Update frequencyEvery 15 monthsEvery 5 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.013.0 — better
Further details — not scored
Size7 MB227 MB
Age rating4+4+
DeveloperEngineered StuffTheorem Solutions Limited

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

SpinFire XR

No in-app purchases

Questions

Is 3D Scratchpad free?
3D Scratchpad is free to download, with in-app purchases available.
Is SpinFire XR free?
SpinFire XR is free to download, with no in-app purchases.
Do 3D Scratchpad or SpinFire XR have ads?
Neither 3D Scratchpad nor SpinFire XR shows ads.
Which is updated more often, 3D Scratchpad or SpinFire XR?
3D Scratchpad ships an update every 15 months, and SpinFire XR every 5 months. Most recently, 3D Scratchpad was updated on October 13, 2026 and SpinFire XR on October 15, 2026.

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