SpinFire XR vs Solid Engineer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SpinFire XR
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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.
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.
- Visual programming interface
- 3D model creation
- Printable model export
- Beginner to advanced modes
- JavaScript integration
- Keyframe animation
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on September 30, 2026 and September 19, 2026 respectively.
| Parameter | SpinFire XR | Solid Engineer |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 months | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 227 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Theorem Solutions Limited | Axxem B.V. |
In-app purchases
SpinFire XR
No in-app purchases
Solid Engineer
No in-app purchases
Questions
Is SpinFire XR free?
Is Solid Engineer free?
Do SpinFire XR or Solid Engineer have ads?
Which is updated more often, SpinFire XR or Solid Engineer?
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