# STP Viewer vs OpenShape3D

The clearest difference is in-app purchases: OpenShape3D at none against STP Viewer's 3. STP Viewer's advantage is iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. STP Viewer sells 3 in-app purchases, starting at $1.99 per 7 days. OpenShape3D asks for nothing beyond the download.

## The numbers

| Metric | STP Viewer | OpenShape3D |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 5 days |
| Size | 44 MB | 46 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [CODIGITAL SOLUTIONS](https://appshunter.io/developer/1829802387) | [Laan Labs](https://appshunter.io/developer/310916919) |

## What reviewers say

### STP Viewer

[App page](https://appshunter.io/ios/app/stp-viewer-step-3d/id6770497525)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Access | $1.99 | per 7 days |
| Pro Access | $4.99 | per month |
| Pro Access | $9.99 | per year |


### OpenShape3D

[App page](https://appshunter.io/ios/app/openshape3d/id6792536439)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is STP Viewer free?

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

### Is OpenShape3D free?

OpenShape3D is free to download, with no in-app purchases.

### Do STP Viewer or OpenShape3D have ads?

Neither STP Viewer nor OpenShape3D shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*