# iRhino 3D vs Model Scaler

The clearest difference is rating: iRhino 3D at 4.6 against Model Scaler's 2.9. iRhino 3D also leads on update cadence (fortnightly vs every 6 months) and review sentiment (55% vs 40%). Model Scaler's advantage is iOS requirement (9.0 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

iRhino 3D holds the better App Store score, 4.6 against 2.9. That said, the two scores are not equally well evidenced: iRhino 3D has 80 ratings behind it against 12, 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 40% of Model Scaler's.

iRhino 3D ships an update fortnightly, Model Scaler every 6 months. The most recent releases landed on September 20, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | iRhino 3D | Model Scaler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (80 ratings)](https://appshunter.io/ios/app/irhino-3d/id373666504/reviews)** | [2.9 (12 ratings)](https://appshunter.io/ios/app/model-scaler/id528641484/reviews) |
| Number of ratings | **80** | 12 |
| Positive reviews | **55.0% of reviews** | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 6 months |
| Monetization | Free | Free |
| Size | 296 MB | 11 MB |
| Requires iOS | 17.0 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Robert McNeel & Associates](https://appshunter.io/developer/373666507) | [Woodland Scenics](https://appshunter.io/developer/528641487) |

## What reviewers say

### iRhino 3D

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

View and present 3D models from Rhino 3D on your iPhone or iPad. Navigate models with intuitive touch gestures, load files from various sources, and visualize them in augmented reality. Includes a markup tool for annotations.

**Highlights:** 3D model viewing, Touch navigation (pan, zoom, orbit), Cloud storage integration, Augmented Reality (AR) mode, Integrated markup tool

**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


### Model Scaler

[App page](https://appshunter.io/ios/app/model-scaler/id528641484)

This tool instantly converts measurements between U.S. Customary and Metric units for any modeling scale. It's designed to be fast, easy, and efficient for all types of scale modelers.

**Highlights:** Instant scale conversion, U.S. Customary to Metric, Metric to U.S. Customary, Supports any modeling scale, Fast and efficient

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iRhino 3D free?

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

### Is Model Scaler free?

Model Scaler is free to download, with no in-app purchases.

### Which has better reviews, iRhino 3D or Model Scaler?

iRhino 3D is rated higher. iRhino 3D averages 4.6 out of 5 from 80 ratings, while Model Scaler averages 2.9 from 12 ratings.

### Do iRhino 3D or Model Scaler have ads?

Neither iRhino 3D nor Model Scaler shows ads.

### Which is updated more often, iRhino 3D or Model Scaler?

iRhino 3D ships an update fortnightly, and Model Scaler every 6 months. Most recently, iRhino 3D was updated on September 20, 2026 and Model Scaler on June 11, 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.*