# STL to STEP Assistant vs 3D Converter and Viewer

The clearest difference is in-app purchases: 3D Converter and Viewer at none against STL to STEP Assistant's 2. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. STL to STEP Assistant sells 2 one-off in-app purchases. 3D Converter and Viewer asks for nothing beyond the download.

## The numbers

| Metric | STL to STEP Assistant | 3D Converter and Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 35 MB | 3 MB |
| Requires iOS | 17.6 | 17.6 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [维 艾](https://appshunter.io/developer/1771300149) | [Vadim Dey](https://appshunter.io/developer/1884095495) |

## What reviewers say

### STL to STEP Assistant

[App page](https://appshunter.io/ios/app/stl-to-step-assistant/id6769270457)

Convert various 3D mesh model formats into STEP files for CAD workflows. Preview models, choose conversion quality, and export with BRep reconstruction for editable CAD surfaces. Process files locally for enhanced privacy.

**Highlights:** Convert STL, OBJ, GLB, FBX, and more to STEP, BRep reconstruction for editable CAD surfaces, Multiple STEP export quality modes, Preview models before export, Local file processing for privacy, Inspect STEP file results

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Faceted STEP Quality | $6.99 | one-time |
| Unlock CAD Surface Export | $9.99 | one-time |


### 3D Converter and Viewer

[App page](https://appshunter.io/ios/app/3d-converter-and-viewer/id6796347329)

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

**In-app purchases:** none


## Frequently asked questions

### Is STL to STEP Assistant free?

STL to STEP Assistant is free to download, with in-app purchases available.

### Is 3D Converter and Viewer free?

3D Converter and Viewer is free to download, with no in-app purchases.

### Do STL to STEP Assistant or 3D Converter and Viewer have ads?

Neither STL to STEP Assistant nor 3D Converter and Viewer shows ads.

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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.*