# Stitch Viewer Pro vs STL Simple Viewer

The clearest difference is rating: STL Simple Viewer at 4.3 against Stitch Viewer Pro's 2.0. STL Simple Viewer also leads on ratings volume (917 vs 5) and update cadence (every 5 months vs every 28 months). Stitch Viewer Pro's advantage is ads (none vs shown) and iOS requirement (9.0 vs 17.0). On price, review sentiment, in-app purchases and monetization model there is nothing between them.

Both are free to download. Stitch Viewer Pro sells 1 one-off in-app purchase and STL Simple Viewer sells 4 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

STL Simple Viewer holds the better App Store score, 4.3 against 2.0. That said, the two scores are not equally well evidenced: STL Simple Viewer has 917 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 23% of Stitch Viewer Pro's written reviews are positive against 18% of STL Simple Viewer's, so the app with the better star average is not the one people write more warmly about.

Stitch Viewer Pro ships an update every 28 months, STL Simple Viewer every 5 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Stitch Viewer Pro | STL Simple Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (5 ratings)](https://appshunter.io/ios/app/stitch-viewer-pro/id1218233165/reviews) | **[4.3 (917 ratings)](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400/reviews)** |
| Number of ratings | 5 | **917** |
| Positive reviews | **22.7% of reviews** | 18.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 28 months | **Every 5 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 16 MB | 19 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [A.G.S. Active Graphics Software Ltd](https://appshunter.io/developer/1218233164) | [Victor Bovio](https://appshunter.io/developer/327627515) |

## What reviewers say

### Stitch Viewer Pro

[App page](https://appshunter.io/ios/app/stitch-viewer-pro/id1218233165)

View and manage embroidery and quilting designs with realistic previews. Supports numerous file formats and cloud storage integration. Offers a free version with limitations and a full Pro version for unlimited access.

**Highlights:** Realistic embroidery view, Supports major stitch formats, Supports major quilt formats, Cloud storage integration, Color matching to thread charts, Print designs with information, Preview with standard hoops

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Feature Pack | $4.99 | one-time |


### 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


## Frequently asked questions

### Is Stitch Viewer Pro free?

Stitch Viewer Pro is free to download, with in-app purchases available.

### Is STL Simple Viewer free?

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

### Which has better reviews, Stitch Viewer Pro or STL Simple Viewer?

STL Simple Viewer is rated higher. Stitch Viewer Pro averages 2.0 out of 5 from 5 ratings, while STL Simple Viewer averages 4.3 from 917 ratings.

### Do Stitch Viewer Pro or STL Simple Viewer have ads?

STL Simple Viewer shows ads; Stitch Viewer Pro does not.

### Which is updated more often, Stitch Viewer Pro or STL Simple Viewer?

Stitch Viewer Pro ships an update every 28 months, and STL Simple Viewer every 5 months. Most recently, Stitch Viewer Pro was updated on October 26, 2026 and STL Simple Viewer on October 25, 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.*