# iRhino 3D vs STL Simple Viewer

The clearest difference is review sentiment: iRhino 3D at 55% against STL Simple Viewer's 18%. iRhino 3D also leads on in-app purchases (none vs 4) and ads (none vs shown). STL Simple Viewer's advantage is ratings volume (923 vs 83). On price, device support and iOS requirement 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. iRhino 3D asks for nothing beyond the download.

iRhino 3D holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: STL Simple Viewer has 923 ratings behind it against 83, so its average is the more settled of the two. Written reviews point the same way: 55% of iRhino 3D's written reviews are positive against 18% of STL Simple Viewer's.

iRhino 3D ships an update every 3 weeks, STL Simple Viewer every 5 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | iRhino 3D | STL Simple Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (83 ratings)](https://appshunter.io/ios/app/irhino-3d/id373666504/reviews)** | [4.3 (923 ratings)](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400/reviews) |
| Number of ratings | 83 | **923** |
| Positive reviews | **55.2% of reviews** | 18.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 305 MB | 19 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Robert McNeel & Associates](https://appshunter.io/developer/373666507) | [Victor Bovio](https://appshunter.io/developer/327627515) |

## What reviewers say

### iRhino 3D

[App page](https://appshunter.io/ios/app/irhino-3d/id373666504)

View and present 3D models on your iPhone or iPad. Effortlessly load files from cloud storage or your device, and use AR mode to visualize designs in real-world space. Includes a markup tool for annotations.

**Highlights:** 3D model viewing, AR mode visualization, Cloud storage integration, Built-in file browser, Markup tool for annotations, Pan, zoom, and orbit controls

**In-app purchases:** none

**What reviewers like**

- 👍 Smooth and intuitive 3D model manipulation
- 🚀 Fast performance with complex models
- 📱 Great for client presentations and demos
- 💼 Useful for on-the-go model viewing
- 🔄 Good Dropbox integration

**What reviewers complain about**

- 🐛 Frequent crashes on large files
- ❌ Limited to viewer functionality only
- 🚫 No native editing capabilities
- 📉 Poor LiDAR measurement accuracy
- 🔌 No iCloud Drive support

**Reported bugs**

- App crashes with large or complex files
- LiDAR measurements significantly inaccurate (off by ~2x)
- Cannot open local files without cloud storage
- Incompatibility with newer iOS versions
- App crashes during room scanning

**Requested features**

- Full native Rhino with Grasshopper support
- Real editing and modeling tools
- Wireframe and shaded view options
- Orthographic views (top, front, right)
- Texture and material support


### 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 iRhino 3D free?

iRhino 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, iRhino 3D or STL Simple Viewer?

iRhino 3D is rated higher. iRhino 3D averages 4.6 out of 5 from 83 ratings, while STL Simple Viewer averages 4.3 from 923 ratings.

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

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

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

iRhino 3D ships an update every 3 weeks, and STL Simple Viewer every 5 months. Most recently, iRhino 3D was updated on November 6, 2026 and STL Simple Viewer on November 3, 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.*