# Gas Tech vs STP Viewer

The clearest difference is in-app purchases: Gas Tech at none against STP Viewer's 3. On price, ads, device support and iOS requirement there is nothing between them.

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

## The numbers

| Metric | Gas Tech | STP Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/stp-viewer-step-3d/id6770497525/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | — |
| Monetization | — | Free with in-app purchases |
| Size | 56 MB | 44 MB |
| Requires iOS | **12.2** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rural Computer Consultants, Inc.](https://appshunter.io/developer/640795441) | [CODIGITAL SOLUTIONS](https://appshunter.io/developer/1829802387) |

## What reviewers say

### Gas Tech

[App page](https://appshunter.io/ios/app/gas-tech/id6447905896)

**Features:** macOS Compatibility

**In-app purchases:** none


### STP Viewer

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

This application allows users to open and view large, complex 3D CAD files on their mobile devices. It supports standard STEP and STP file formats, offering smooth navigation and offline accessibility for professionals and enthusiasts alike.

**Highlights:** Open STP and STEP files, Fluid 3D navigation (orbit, pan, zoom), Instant file loading from various sources, View complex assemblies, Offline accessibility, Battery and RAM efficient, Supports files from major CAD software

**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 |


## Frequently asked questions

### Is Gas Tech free?

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

### Is STP Viewer free?

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

### Do Gas Tech or STP Viewer have ads?

Neither Gas Tech nor STP 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.*