Comparison

SpinFire XR vs Solid Engineer

Price, ratings, monetisation and update history for both apps, side by side — 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 • 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.

About

Solid Engineer

This app teaches programming through visual 3D model creation. It offers modes for beginners to advanced users, including JavaScript support. Models can be printed or shared.

Highlights
  • Visual programming interface
  • 3D model creation
  • Printable model export
  • Beginner to advanced modes
  • JavaScript integration
  • Keyframe animation
Features
Read full description

Learn programming and create 3D models that can be printed or shared with other users. The 'basic' mode helps students to learn the basics of programming by dragging and dropping programming statements. The 'advanced' mode supports subtracting and intersecting volumes, profiles, parameters, part libraries and keyframe animation. In the 'programmer' mode you can use the power of modern JavaScript such as arrow functions, maps and filters.

Screenshots

SpinFire XR4 screens
Solid Engineer4 screens

Verdict

The call

The clearest difference is iOS requirement: SpinFire XR at 13.0 against Solid Engineer's 15.6. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on September 30, 2026 and September 19, 2026 respectively.

Scorecard1 real difference · 9 level
SpinFire XR versus Solid Engineer: the parameters behind the verdict, then further details
ParameterSpinFire XRSolid Engineer
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 5 monthsEvery 5 months
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size227 MB16 MB
Age rating4+4+
DeveloperTheorem Solutions LimitedAxxem B.V.

In-app purchases

None

SpinFire XR

No in-app purchases

None

Solid Engineer

No in-app purchases

Questions

Is SpinFire XR free?
SpinFire XR is free to download, with no in-app purchases.
Is Solid Engineer free?
Solid Engineer is free to download, with no in-app purchases.
Do SpinFire XR or Solid Engineer have ads?
Neither SpinFire XR nor Solid Engineer shows ads.
Which is updated more often, SpinFire XR or Solid Engineer?
SpinFire XR ships an update every 5 months, and Solid Engineer every 5 months. Most recently, SpinFire XR was updated on September 30, 2026 and Solid Engineer on September 19, 2026.

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