Comparison

PortX vs STL File Viewer Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

PortX

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
Read full description

****** Please switch to our new app, Xcasca. This app will be deprecated soon. ****** Xcasca, the new version of PortX, is now available! This current app will soon be deprecated, so please install Xcasca to continue. You can install Xcasca from the link below. https://apps.apple.com/app/xcasca-ssh-sftp-client/id6749602189 --------------------------------------------------------------- PortX Mobile brings the power of our desktop SSH Client to your mobile device (SFTP is currently available on the Desktop version only, but will be supported on Mobile soon). With a wide variety of features in a lightweight package, PortX Mobile allows you to access and manage remotes systems on-the-go through an intuitive user interface. PortX Mobile Features: ◦ Multi-Session Support. Have multiple connections open at once. Access to any of your sessions a just a finger-swipe or click away. ◦ Intuitive Session Management. Organize and edit your sessions with PortX’s session management. ◦ Compose Bar. The multi-line Compose Bar allows you to type out, edit, and review your string before sending. ◦ Advance Keyboard. Quick access to all special characters for whatever the situation calls for. ◦ Multiple Authentication Types. Password, Public Key, and Keyboard Interactive authentication support. ◦ Customizations. Modify appearance, font, and colors. ◦ Ad-Free ◦ More features coming soon. ◦ Desktop version also available for Mac, Windows, and Linux. PortX redefines how you interact with a mobile SSH Client. On-the-go session management has never been easier.

About

STL File Viewer Pro

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
Read full description

View, Rotate & Inspect Your 3D STL Files with Ease! Open any STL file in seconds — no sign-up, no clutter, just your 3D model ready to explore. STL File Viewer lets you load, rotate, zoom, and inspect 3D STL files directly on your iPhone or iPad. Built for speed, it handles everything from small parts to complex models smoothly. Whether you're reviewing jewelry CAD files before production, checking 3D print files for errors, or inspecting engineering designs on the go — this is the fastest way to view STL files on iOS. WHAT YOU GET: Instant file loading — open STL files from Files, email, AirDrop, or any app Full 360° control — rotate, zoom, and pan with intuitive touch gestures Measure STL file distance between 2 points Estimate STL File Weight in different materials Sharp detail rendering Light & dark mode — comfortable viewing anywhere Lightweight & fast — no bloat, no lag BUILT FOR: - 3D printing enthusiasts previewing files before printing - Jewelry designers reviewing CAD models - Engineers and architects inspecting parts on the go - Students and hobbyists exploring 3D models No account required. Just open and view using our simple STL Viewer App. Download now and see your CAD files the way they're meant to be seen. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

PortX4 screens
STL File Viewer Pro3 screens

Verdict

The call

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 (#33 vs unranked). On price there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard10 real differences · 1 level
PortX versus STL File Viewer Pro: the parameters behind the verdict, then further details
ParameterPortXSTL File Viewer Pro
PriceFreeFree
Rating3.7 (19 ratings)4.5 (65 ratings) — better
Positive reviews72.5% of reviews — better10.0% of reviews
Number of ratings1965 — better
Update frequencyMonthlyFortnightly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank—#33 — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS12.0 — better16.6
Further details — not scored
Size58 MB16 MB
Age rating4+4+
DeveloperNetSarang Computer, Inc.Andeesh Mehdi Syed

Customer experience

PortX

All ratings19 ratings
Positive63.2%
Neutral5.3%
Negative31.6%
Written reviews120 reviews
Positive72.5%
Neutral12.5%
Negative15.0%

STL File Viewer Pro

All ratings65 ratings
Positive86.2%
Neutral1.5%
Negative12.3%
Written reviews10 reviews
Positive10.0%
Neutral0.0%
Negative90.0%

In-app purchases

None

PortX

No in-app purchases

3 purchases

STL File Viewer Pro

Subscriptions3
  • Weekly3 Days trial$1.997 Days
  • Monthly3 Days trial$3.991 Month
  • Ad Free for 1 Year3 Days trial$24.991 Year

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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