# 3D Simplify vs Model Viewer | CAD Viewer

The clearest difference is update cadence: 3D Simplify at every 4 days against Model Viewer | CAD Viewer's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 3D Simplify sells 2 in-app purchases, starting at $2.99 per month and Model Viewer | CAD Viewer sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

3D Simplify ships an update every 4 days, Model Viewer | CAD Viewer every 2 weeks. The most recent releases landed on October 17, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | 3D Simplify | Model Viewer | CAD Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/model-viewer-cad-viewer/id6781777518/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | — | Free |
| Size | 7 MB | 12 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Po hin Ma](https://appshunter.io/developer/1642346331) | [Astonish Innovations](https://appshunter.io/developer/487194923) |

## What reviewers say

### 3D Simplify

[App page](https://appshunter.io/ios/app/3d-simplify-usdz-optimizer/id6759809139)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reduce3D Pro Monthly | $2.99 | per month |
| Reduce3D Pro Yearly | $19.99 | per year |


### Model Viewer | CAD Viewer

[App page](https://appshunter.io/ios/app/model-viewer-cad-viewer/id6781777518)

View and inspect 3D model files with ease. Import various formats, manipulate the view with intuitive controls, and access basic model information on a clear workspace.

**Highlights:** 3D model inspection, Import multiple file formats, Rotate, pan, and zoom controls, Toggle grid workspace, View basic model details

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Model Viewer Pro Monthly | $1.99 | per month |
| Model Viewer Pro Yearly | $19.99 | per year |


## Frequently asked questions

### Is 3D Simplify free?

3D Simplify is free to download, with in-app purchases available.

### Is Model Viewer | CAD Viewer free?

Model Viewer | CAD Viewer is free to download, with in-app purchases available.

### Do 3D Simplify or Model Viewer | CAD Viewer have ads?

Neither 3D Simplify nor Model Viewer | CAD Viewer shows ads.

### Which is updated more often, 3D Simplify or Model Viewer | CAD Viewer?

3D Simplify ships an update every 4 days, and Model Viewer | CAD Viewer every 2 weeks. Most recently, 3D Simplify was updated on October 17, 2026 and Model Viewer | CAD Viewer on October 19, 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.*