# STL Simple Viewer vs Tolleranze

The clearest difference is price: STL Simple Viewer at Free against Tolleranze's $3.99. Tolleranze's advantage is in-app purchases (none vs 4) and ads (none vs shown). On device support there is nothing between them.

STL Simple Viewer is free to download; Tolleranze costs $3.99 up front. STL Simple Viewer sells 4 in-app purchases, starting at $0.99 per 7 days. Tolleranze asks for nothing beyond the download.

STL Simple Viewer ships an update every 5 months, Tolleranze every 9 days. The most recent releases landed on November 11, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | STL Simple Viewer | Tolleranze |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[4.3 (929 ratings)](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400/reviews)** | — |
| Number of ratings | **929** | — |
| Positive reviews | 18.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 5 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Victor Bovio](https://appshunter.io/developer/327627515) | [Morad Ouaid](https://appshunter.io/developer/6804087425) |

## 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


### Tolleranze

[App page](https://appshunter.io/ios/app/tolleranze/id6804087423)

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

**In-app purchases:** none


## Frequently asked questions

### Is STL Simple Viewer free?

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

### Is Tolleranze free?

Tolleranze costs $3.99, with no in-app purchases.

### Do STL Simple Viewer or Tolleranze have ads?

STL Simple Viewer shows ads; Tolleranze does not.

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

STL Simple Viewer ships an update every 5 months, and Tolleranze every 9 days. Most recently, STL Simple Viewer was updated on November 11, 2026 and Tolleranze on September 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.*