# Lumis 3D vs STL Simple Viewer

The clearest difference is review sentiment: Lumis 3D at 100% against STL Simple Viewer's 18%. Lumis 3D also leads on rating (5.0 vs 4.3) and in-app purchases (none vs 4). STL Simple Viewer's advantage is ratings volume (918 vs 1). On price and device support 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. Lumis 3D asks for nothing beyond the download.

Lumis 3D holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: STL Simple Viewer has 918 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Lumis 3D's written reviews are positive against 18% of STL Simple Viewer's.

Lumis 3D ships an update every 5 weeks, STL Simple Viewer every 5 months. The most recent releases landed on October 19, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Lumis 3D | STL Simple Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lumis-3d/id1096580497/reviews)** | [4.3 (918 ratings)](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400/reviews) |
| Number of ratings | 1 | **918** |
| Positive reviews | **100.0% of reviews** | 18.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 5 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 190 MB | 19 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Lumiscaphe](https://appshunter.io/developer/595372525) | [Victor Bovio](https://appshunter.io/developer/327627515) |

## What reviewers say

### Lumis 3D

[App page](https://appshunter.io/ios/app/lumis-3d/id1096580497)

Transport photorealistic 3D models with their full functionality and rendering quality to any location. Access and share all your Lumis 3D documents, including images, videos, and presentations, in real-time or offline.

**Highlights:** Real-time rendering, Offline mode with pre-rendered scenarios, Access to all Lumis 3D documents, Share current view via other apps, Intuitive 3D navigation, Supports camera and model animations

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Lumis 3D free?

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

### Is STL Simple Viewer free?

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

### Which has better reviews, Lumis 3D or STL Simple Viewer?

Lumis 3D is rated higher. Lumis 3D averages 5.0 out of 5 from 1 ratings, while STL Simple Viewer averages 4.3 from 918 ratings.

### Do Lumis 3D or STL Simple Viewer have ads?

STL Simple Viewer shows ads; Lumis 3D does not.

### Which is updated more often, Lumis 3D or STL Simple Viewer?

Lumis 3D ships an update every 5 weeks, and STL Simple Viewer every 5 months. Most recently, Lumis 3D was updated on October 19, 2026 and STL Simple Viewer on October 26, 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.*