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STL Simple Viewer

STL Simple Viewer

View STL, 3MF & DXF 3D models

904 ratings
166 reviews
With Ads
🔧 Utilities
📊 Productivity
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated
  • January 11, 2020
  • October 5, 2026

Features

Developer

Victor Bovio
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STL Simple Viewer screenshot #1 for iPhone
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STL Simple Viewer screenshot #4 for iPhone
iphone
ipad
🧾$2.99 - $3.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
⭐166
Reviews↘︎
📝23+ tags
Tags↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦~ in 5 months
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About

Easily view and interact with 3D STL CAD models. Supports various file types and offers advanced rendering options for detailed analysis. Get model information and explore interiors with clipping planes.

✓View ASCII and Binary STL files
✓Load STL from ZIP
✓Rotate, pan, and zoom
✓Orthogonal and Perspective modes
✓Model info (triangle count, bounding box)
✓Rendering options (faces, edges, transparency)
✓Clipping plane for interiors
Show original description

What users say

Summarized from real user reviews of STL Simple Viewer. Based on 904 reviews and a 4.3/5 average, it highlights the 3 positives and 4 negatives reviewers mention most about this Productivity app.

Positive things

  • 🚀Simple and intuitive viewer
  • 👍Useful viewing options
  • 💡Supports multiple file formats

Negative things

  • 🐛Frequent crashes
  • 🔋High battery consumption
  • 🚨Excessive and intrusive ads
  • 🔍Limited functionality for larger files
See all reviews
+1

What's New in STL Simple Viewer

2.2

October 5, 2026

* New toolbar actions for: * Take a Screenshot * Change view to: Isometric, Back, Bottom & Left * Option for extended toolbar or compact layout * Support for loading DXF (3D) files * Added export to STL & 3MF formats * Option to show/hide texts in toolbar and tab icons in Help section * Bug fixes

More
1

Subscriptions & In-App Purchases

Pro version (1 week plan)

All Premium features for 1 week

$0.997 Days
How to cancel STL Simple Viewer subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

Bonne appli

Très bien pour visualiser les STL que j’ai conçu avec FreeCad
Alain-BEAlain-BE

it sucks

it isn't that good
mason.exc mason.exc 

Good app, dangerous ads

The app itself works well but I lost all confidence in it today when I was presented with an ad claiming my phone has viruses. Ad driven apps are one thing but malicious ads make the app dangerous.
ZxyxzxbxzZxyxzxbxz

Sehr aufdringliche Werbung

Eigentlich sehr funktionell, leider sorgt die Art der Werbung dafür, dass die App kaum benutzbar ist und 1,99€/ monatlich ist keine Alternative. Eine Einmalzahlung wäre eher darstellbar, dann aber mit einen erweiterten Funktionsumfang
Plüschmoors_1Plüschmoors_1

Sneaky

Great App but very sneaky. When trying to view any file that is even moderately large, it won’t let you, and says you have to upgrade to a subscription. I’ll pay a reasonable fixed price, but no subscription. Will turf this and use another App.
Technical User Alpha HaloTechnical User Alpha Halo
See 161 more reviews

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User experience

🐞

Reported Bugs

3 issues

App crashes when opening larger STL files

Bug

Inability to open some file formats

Bug

Ads continue to appear even after paying for ad removal

Bug
✨

Requested Features

3 requests

Add ability to save color/lighting settings

Feature

Improve stability and reduce crashes

Feature

Provide an ad-free paid version

Feature

FAQ

What can I do with STL Simple Viewer?

STL Simple Viewer allows you to quickly view 3D STL CAD models. You can rotate, pan, and zoom to inspect the model from different angles. It also provides detailed information about the model and offers advanced rendering options.

What types of STL files does it support?

The app supports both ASCII and Binary STL file formats. You can also load an STL file directly from a ZIP archive, making it convenient to manage your models.

Is STL Simple Viewer free to use?

The application is free to download and use, but it does include in-app purchases and advertisements. These may offer additional features or an ad-free experience.

What kind of model information can I get?

You can obtain crucial information about your 3D model, including its triangle count, bounding box dimensions, surface area, and volume. This data is essential for analysis and further processing.

Can I view the interior of a model?

Yes, the app features a clipping plane option. This is particularly useful for viewing the interior structures of complex models without needing to see the entire object.