# SpinFire XR vs Digit 3D CAD

The clearest difference is in-app purchases: SpinFire XR at none against Digit 3D CAD's 4. SpinFire XR also leads on iOS requirement (13.0 vs 16.4). Digit 3D CAD's advantage is update cadence (every 2 days vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. Digit 3D CAD sells 4 in-app purchases, starting at $1.99 per month. SpinFire XR asks for nothing beyond the download.

SpinFire XR ships an update every 5 months, Digit 3D CAD every 2 days. Both last shipped on November 3, 2026.

## The numbers

| Metric | SpinFire XR | Digit 3D CAD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/digit-3d-cad/id6808500363/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 94.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 days** |
| Monetization | — | Freemium |
| Size | 227 MB | 78 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Theorem Solutions Limited](https://appshunter.io/developer/1380153381) | [运保 罗](https://appshunter.io/developer/6808351850) |

## What reviewers say

### SpinFire XR

[App page](https://appshunter.io/ios/app/spinfire-xr/id1584959423)

**In-app purchases:** none


### Digit 3D CAD

[App page](https://appshunter.io/ios/app/digit-3d-cad/id6808500363)

Create detailed 3D models and technical drawings on your iPhone or iPad. This app offers parametric modeling, sketching tools with Apple Pencil support, and assembly capabilities. Import and export various file formats for seamless workflow.

**Highlights:** Parametric 3D modeling, Sketching with constraints, Assembly and 2D drawings, Apple Pencil support, Import/export multiple file formats, Parametric history editing

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Digit 3D Pro (monthly) | $1.99 | per month |
| Digit 3D Max (monthly) | $2.99 | per month |
| Digit 3D Pro (yearly) | $9.99 | per year |
| Digit 3D Max (yearly) | $17.99 | per year |


## Frequently asked 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 in-app purchases available.

### 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 every 2 days. Most recently, SpinFire XR was updated on November 3, 2026 and Digit 3D CAD on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*