# STL Simple Viewer vs CAD FastView

STL Simple Viewer and CAD FastView both sit at 4.3 stars, but that hides the real split: 54% of CAD FastView's written reviews are positive against 18% of STL Simple Viewer's. CAD FastView also leads on ads (none vs shown) and update cadence (fortnightly vs every 5 months). STL Simple Viewer's advantage is ratings volume (920 vs 56). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. STL Simple Viewer sells 4 in-app purchases, starting at $0.99 per 7 days and CAD FastView sells 3 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.3 for STL Simple Viewer against 4.1 for CAD FastView. That said, the two scores are not equally well evidenced: STL Simple Viewer has 920 ratings behind it against 56, so its average is the more settled of the two. Written reviews are what separate them: 18% of STL Simple Viewer's written reviews are positive against 54% of CAD FastView's.

STL Simple Viewer ships an update every 5 months, CAD FastView fortnightly. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | STL Simple Viewer | CAD FastView |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (920 ratings)](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400/reviews)** | [4.1 (56 ratings)](https://appshunter.io/ios/app/cad-fastview-dwg-viewer/id6461084049/reviews) |
| Number of ratings | **920** | 56 |
| Positive reviews | 18.1% of reviews | **54.2% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 19 MB | 33 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Victor Bovio](https://appshunter.io/developer/327627515) | [镇源 余](https://appshunter.io/developer/1702066939) |

## What reviewers say

### STL Simple Viewer

[App page](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400)

Easily view and interact with 3D STL CAD models. Supports various file types and offers advanced rendering options for detailed analysis. Get model information and explore interiors with clipping planes.

**Highlights:** View ASCII and Binary STL files, Load STL from ZIP, Rotate, pan, and zoom, Orthogonal and Perspective modes, Model info (triangle count, bounding box), Rendering options (faces, edges, transparency), Clipping plane for interiors

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro version (1 week plan) | $0.99 | per 7 days |
| Pro version (1 month plan) | $1.99 | per month |
| Remove Ads | $2.99 | one-time |
| Export Pack | $3.99 | one-time |

**What reviewers like**

- 🚀 Simple and intuitive viewer
- 👍 Useful viewing options
- 💡 Supports multiple file formats

**What reviewers complain about**

- 🐛 Frequent crashes
- 🔋 High battery consumption
- 🚨 Excessive and intrusive ads
- 🔍 Limited functionality for larger files

**Reported bugs**

- App crashes when opening larger STL files
- Inability to open some file formats
- Ads continue to appear even after paying for ad removal

**Requested features**

- Add ability to save color/lighting settings
- Improve stability and reduce crashes
- Provide an ad-free paid version


### CAD FastView

[App page](https://appshunter.io/ios/app/cad-fastview-dwg-viewer/id6461084049)

View, convert, and print CAD drawings on your mobile device. Supports DWG, DXF, and PDF formats with iCloud sync and Wi-Fi printing. Ideal for architects, engineers, and construction professionals.

**Highlights:** Fast DWG/DXF viewing, Convert drawings to PDF, Wi-Fi printing, iCloud synchronization, Layer layout management, Multiple viewing options

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.99 | per 7 days |
| Monthly | $12.99 | per month |
| Yearly | $29.99 | per year |


## Frequently asked questions

### Is STL Simple Viewer free?

STL Simple Viewer is free to download, with in-app purchases available.

### Is CAD FastView free?

CAD FastView is free to download, with in-app purchases available.

### Which has better reviews, STL Simple Viewer or CAD FastView?

STL Simple Viewer is rated higher. STL Simple Viewer averages 4.3 out of 5 from 920 ratings, while CAD FastView averages 4.1 from 56 ratings.

### Do STL Simple Viewer or CAD FastView have ads?

STL Simple Viewer shows ads; CAD FastView does not.

### Which is updated more often, STL Simple Viewer or CAD FastView?

STL Simple Viewer ships an update every 5 months, and CAD FastView fortnightly. Most recently, STL Simple Viewer was updated on October 29, 2026 and CAD FastView on October 30, 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.*