Comparison

SpinFire XR vs Digit 3D CAD

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

Head to head
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 β€’ Image tracking – Track 3D digital content against a chosen image target to place the content in a desired location. β€’ AR Viewer – Use your environment and place 3D digital content on recognised surfaces to help visualize 3d models. β€’ Model Tracking (target model) – Overlays the 3D digital content over an already created prototype. β€’ Model Tracking (alternate model) – Overlays other selected content over the target model to view models within context. FEATURES β€’ Manipulate your 3D model in the real-world by using the Manipulation box to move, rotate and revolve your model. β€’ Scale your model to get a closer look at your design. β€’ Hide and occlude parts and components to only see what is necessary. β€’ Use measurement tools including point-to-point, offset and vertex snapping. β€’ Display and review metadata for each component. β€’ Capture screenshots of the current view of your model, mark-up your images and save to your device or server. β€’ Enable world occlusion to see if models fit within their current space.

About

Digit 3D CAD

Create 3D models and designs on your mobile device. Offers free sketching and modeling tools, with an optional subscription for advanced features like export, rendering, and analysis.

Highlights
  • 3D sketching and modeling
  • Parametric history
  • STEP/STL/3MF export (Pro)
  • Section views (Pro)
  • Measurement and analysis (Pro)
  • Rendering (Pro)
  • Drawing export (Pro)
Features
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FREE AND PRO Sketching, modeling, and parametric history are free to use. Digit 3D Pro is an auto-renewable subscription that unlocks STEP/STL/3MF export, section views, measurement and analysis, rendering, and drawing export. β€’ Digit 3D Pro (Monthly) β€” [PRICE] per month β€’ Digit 3D Pro (Yearly) β€” [PRICE] per year Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours prior to the end of the current period. You can manage your subscription and turn off auto-renewal in your Apple Account settings after purchase. Terms of Use: https://digit3d.top/terms.html Privacy Policy: https://digit3d.top/privacy.html

Screenshots

SpinFire XR4 screens
Digit 3D CAD4 screens

Verdict

The call

The clearest difference is update cadence: Digit 3D CAD at daily against SpinFire XR's every 5 months. SpinFire XR's advantage is iOS requirement (13.0 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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

Scorecard2 real differences Β· 6 level
SpinFire XR versus Digit 3D CAD: the parameters behind the verdict, then further details
ParameterSpinFire XRDigit 3D CAD
PriceFreeFree
Positive reviewsβ€”100.0% of reviews
Update frequencyEvery 5 monthsDaily β€” better
AdsNoNo
In-app purchasesNoNo
Monetizationβ€”Freemium
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS13.0 β€” better16.4
Further details β€” not scored
Size227 MB76 MB
Age rating4+4+
DeveloperTheorem Solutions Limited运保 η½—

In-app purchases

None

SpinFire XR

No in-app purchases

None

Digit 3D CAD

No in-app purchases

Questions

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

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