# 3D PDF Viewer vs 3D CAD Model Viewer

The clearest difference is rating: 3D CAD Model Viewer at 3.3 against 3D PDF Viewer's 1.5. 3D CAD Model Viewer also leads on review sentiment (40% vs 0%) and update cadence (every 5 weeks vs every 10 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

3D CAD Model Viewer holds the better App Store score, 3.3 against 1.5. That said, the two scores are not equally well evidenced: 3D CAD Model Viewer has 13 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of 3D PDF Viewer's written reviews are positive against 40% of 3D CAD Model Viewer's.

3D PDF Viewer ships an update every 10 months, 3D CAD Model Viewer every 5 weeks. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | 3D PDF Viewer | 3D CAD Model Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.5 (2 ratings)](https://appshunter.io/ios/app/3d-pdf-viewer/id919857557/reviews) | **[3.3 (13 ratings)](https://appshunter.io/ios/app/3d-cad-model-viewer/id973428442/reviews)** |
| Number of ratings | 2 | **13** |
| Positive reviews | 0.0% of reviews | **40.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 21 MB | 50 MB |
| Requires iOS | 15.6 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ProtoTech Solutions and Services Pvt. Ltd.](https://appshunter.io/developer/365252924) | [Machine Research Corporation](https://appshunter.io/developer/973428441) |

## What reviewers say

### 3D PDF Viewer

[App page](https://appshunter.io/ios/app/3d-pdf-viewer/id919857557)

View and interact with 3D models embedded in PDF files on your mobile device. Easily zoom, pan, and rotate models using intuitive multi-touch gestures. Load files directly from cloud storage services like Dropbox and Google Drive.

**Highlights:** 3D PDF model rendering (.prc), Multi-touch gestures (zoom, pan, rotate), Import from cloud storage, Open password-protected PDFs, Integrated Box and Dropbox browsing, Supports meshes and colors

**In-app purchases:** none


### 3D CAD Model Viewer

[App page](https://appshunter.io/ios/app/3d-cad-model-viewer/id973428442)

Easily view, analyze, and share 3D CAD models and drawings from various file formats. Organize your models into a catalog for quick reference and access job information. Streamline your quoting process by leveraging past projects and profitability data.

**Highlights:** View models from any angle, Apply bounding box for measurements, Markup and annotate models, Build a catalog of models, Translate models to STL, STEP, 3D PDFs, Share models via email or Slack

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 3D PDF Viewer free?

3D PDF Viewer is free to download, with no in-app purchases.

### Is 3D CAD Model Viewer free?

3D CAD Model Viewer is free to download, with no in-app purchases.

### Which has better reviews, 3D PDF Viewer or 3D CAD Model Viewer?

3D CAD Model Viewer is rated higher. 3D PDF Viewer averages 1.5 out of 5 from 2 ratings, while 3D CAD Model Viewer averages 3.3 from 13 ratings.

### Do 3D PDF Viewer or 3D CAD Model Viewer have ads?

Neither 3D PDF Viewer nor 3D CAD Model Viewer shows ads.

### Which is updated more often, 3D PDF Viewer or 3D CAD Model Viewer?

3D PDF Viewer ships an update every 10 months, and 3D CAD Model Viewer every 5 weeks. Most recently, 3D PDF Viewer was updated on October 16, 2026 and 3D CAD Model Viewer on October 5, 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.*