# PortX vs STL File Viewer Pro

The clearest difference is review sentiment: PortX at 73% against STL File Viewer Pro's 10%. PortX also leads on in-app purchases (none vs 3) and ads (none vs shown). STL File Viewer Pro's advantage is rating (4.5 vs 3.7) and chart position (#41 vs unranked). On price there is nothing between them.

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

STL File Viewer Pro holds the better App Store score, 4.5 against 3.7. Both are backed by a comparable volume of ratings — 19 and 65 respectively. Written reviews complicate that: 73% of PortX's written reviews are positive against 10% of STL File Viewer Pro's, so the app with the better star average is not the one people write more warmly about.

PortX ships an update monthly, STL File Viewer Pro fortnightly. The most recent releases landed on September 20, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | PortX | STL File Viewer Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (19 ratings)](https://appshunter.io/ios/app/portx-ssh-deprecated/id1566480505/reviews) | **[4.5 (65 ratings)](https://appshunter.io/ios/app/stl-file-viewer-pro/id6741022143/reviews)** |
| Number of ratings | 19 | **65** |
| Positive reviews | **72.5% of reviews** | 10.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | — | **#41** |
| Size | 58 MB | 16 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NetSarang Computer, Inc.](https://appshunter.io/developer/1563674950) | [Andeesh Mehdi Syed](https://appshunter.io/developer/1676226599) |

## What reviewers say

### PortX

[App page](https://appshunter.io/ios/app/portx-ssh-deprecated/id1566480505)

Access and manage remote systems on your mobile device with this powerful SSH client. It offers multi-session support, intuitive session management, and an advanced keyboard for efficient command input. Customize appearance and enjoy an ad-free experience.

**Highlights:** Multi-session support, Intuitive session management, Multi-line compose bar, Advanced keyboard with special characters, Multiple authentication types, Customizable appearance

**Features:** Vision Pro support

**In-app purchases:** none


### STL File Viewer Pro

[App page](https://appshunter.io/ios/app/stl-file-viewer-pro/id6741022143)

**Currently charting:** #41 Top Grossing · Developer Tools, #107 Top Free · Developer Tools (US App Store)

Easily view, rotate, and inspect 3D STL files on your iPhone or iPad. Load models instantly from various sources for 3D printing, design review, or engineering inspection.

**Highlights:** Instant STL file loading, Full 360° rotation and zoom, Sharp detail rendering, Light and dark mode support, Lightweight and fast performance, Open files from Files, email, AirDrop

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.99 | per 7 days |
| Monthly | $3.99 | per month |
| Ad Free for 1 Year | $24.99 | per year |


## Frequently asked questions

### Is PortX free?

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

### Is STL File Viewer Pro free?

STL File Viewer Pro is free to download, with in-app purchases available.

### Which has better reviews, PortX or STL File Viewer Pro?

STL File Viewer Pro is rated higher. PortX averages 3.7 out of 5 from 19 ratings, while STL File Viewer Pro averages 4.5 from 65 ratings.

### Do PortX or STL File Viewer Pro have ads?

STL File Viewer Pro shows ads; PortX does not.

### Which is updated more often, PortX or STL File Viewer Pro?

PortX ships an update monthly, and STL File Viewer Pro fortnightly. Most recently, PortX was updated on September 20, 2026 and STL File Viewer Pro on September 24, 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.*