# STL Simple Viewer — View 3D STL & 3MF CAD models

> 3D STL CAD model viewer with interactive manipulation and detailed analysis. (iPhone/iPad app by Victor Bovio.)

- Source: https://appshunter.io/ios/app/stl-simple-viewer/id1493598400 (this page in markdown: same URL + `.md`)
- Developer: [Victor Bovio](https://appshunter.io/developer/327627515)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Rating: 4.30/5 from 866 App Store ratings · 155 written reviews indexed
- Age rating: +4
- Requires: iOS 17.0 · 19 MB
- Languages: American English
- Released: 2020-01-11
- Data updated: 2026-08-26
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/stl-simple-viewer/id1493598400/reviews.md

## What is STL Simple Viewer?

STL Simple Viewer is a great app to quickly view 3D STL & 3MF files and export them to the most commonly used CAD formats.

Features:
- Supports STL files both ASCII and Binary formats.
- Supports 3MF files.
- Load STL and 3MF files directly from ZIP archives.
- Export to DXF, OBJ, DAE, PLY and USD.
- Rotate, pan, and zoom models with intuitive touch controls.
- Measure distances between points within your model.
- Configure rendering options: faces, edges, points, background and transparency.
- Render using a clipping plane (useful for viewing model interiors).
- View models in Orthographic or Perspective mode.
- Obtain model information including triangle count, bounding box, surface area, and volume.

Privacy Policy: https://www.boviosoft.com/apps/privacy.html

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

For support or questions:
support@boviosoft.com

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro version (1 week plan) | $0.99 | per 7 days |
| Pro version (1 month plan) | $1.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |
| Export to OBJ, DAE, DXF, PLY | $3.99 | one-time |


## What do users think of STL Simple Viewer?

Overall sentiment: negative

**Pros**

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

**Cons**

- 🐛 Frequent crashes
- 🔋 High battery consumption
- 🚨 Excessive and intrusive ads
- 🔍 Limited functionality for larger files

**Commonly reported bugs**

- App crashes when opening larger STL files
- Inability to open some file formats
- Ads continue to appear even after paying for ad removal

**Most requested features**

- Add ability to save color/lighting settings
- Improve stability and reduce crashes
- Provide an ad-free paid version

## Recent user reviews (10 of 155)

All indexed reviews: https://appshunter.io/ios/app/stl-simple-viewer/id1493598400/reviews.md

### 2/5 — Glitchy

*2026-07-14*

Constantly glitching and crashing. Even while attempting to write this review

### 1/5 — Works for 30 secs

*2026-07-09, version 2.0*

App constantly quits as soon as it loads an stl. 2.0 is still riddled with ads, listen I’m not against ads but every damn minute is annoying.

### 3/5 — Mid

*2026-06-05*

If you want to view an stl file. You can. If you want to search through a couple you’re gonna get ads. Not a good app. Not a bad one.

**Developer response:** Hello,
Thanks for taking the time to leave a review. You may want to give version 2.0 a try, as it significantly improves the overall app experience. The frequency of ads has also been reduced, and several new features have been added.
If you have any suggestions or feedback, I'd be happy to hear from you at: support@boviosoft.com

### 2/5 — Too many ads

*2026-05-01, version 1.2*

Ads crash app

### 2/5 — Unfortunately it won’t load

*2026-03-18*

It crashes when I try to load anything and doesn’t work

**Developer response:** Hello, 
Thanks for taking the time to leave a review. You may want to give version 2.0 a try, as it significantly improves the overall app experience. 
If you still have any issues, suggestions or feedback, I'd be happy to hear from you at: support@boviosoft.com

### 1/5 — Pornographic ads

*2026-03-15, version 1.2*

Are you kidding me dude

### 1/5 — Так се

*2026-03-10*

Не открывает файлы большего размера, слетает

### 1/5 — Has porn ads. Avoid.

*2026-03-02, version 1.2*

It has ads which are fine but it was basically porn. Not cool.

### 1/5 — Слишком много рекламы

*2026-02-21*

Невозможно смотреть файлы больше 5 секунд - все время вылезает навязчивая реклама. При этом видео рекламы может не загрузиться, в таком случае придется перезагружать приложение и смотреть рекламу заново. 

Я по началу думала, что «ладно, все хотят зарабатывать, мне не сложно посмотреть рекламу», но то количество, которое ждёт вас внутри, выведет любого из равновесия.

### 3/5 — Victor Bovio makes another app called Meshman 3D Viewer for STL DXF OBJ DAE 3DS FBX

*2026-02-16*

Victor Bovio has written an in my opinion a way better app for viewing STL files and yes you do not get the app closer issue every 5 files you view like you get in STL simple viewer app. It is well worth the 6.99 for Meshman 3D Viewer for STL DXF OBJ DAE 3DS FBX plus you get all of these other file formats you can view and even export to from another. I’m guessing the answer is in the name of this app it’s supposed to be a Simple STL viewer and that is what it does. His Meshman 3D Viewer for STL DXF OBJ DAE 3DS FBX is again way better and you get way more features included in the one price. Thank you Victor for a great app!

## Frequently asked questions about STL Simple Viewer

### 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.

## Version history (last 5 releases)

### 2.1 — 2026-08-08

* Reduced memory usage and faster loading for large STL files
* Support for loading 3MF files
* Added export to USD format
* More options for Graphic Settings:
  * Option for Grid positioning
  * Option for gradient Background
  * Option for storing default settings
* Reduced more Ad frequency
* Bug fixes

### 2.0 — 2026-06-29

* Major UI refresh using Apple's latest technologies.
* New enhanced graphics toolbar with:
  * Distance measurement between two points.
  * Zoom to a selected rectangular area.
  * Quick toggle between Orthographic and Perspective views.
  * Option to hide the toolbar for maximum viewing space.
* Improved performance when loading and viewing large STL files.
* Enhanced color selection controls.
* Added a ground grid for improved model visualization.
* Added export to PLY format.
* Enhanced Dark appearance & Landscape orientation.
* Reduced ad frequency.
* Bug fixes and stability improvements.

### 1.2 — 2023-09-11

- Added Export to OBJ, DAE & DXF via in-app purchase
- Reduced Ads frequency
- Bug fixes

### 1.1 — 2020-06-17

- App now remembers each file graphic settings (can be disabled in Preferences).
- Added buttons for graphic operations (available if Remove Ads is purchased).
- Bug fixes.

### 1.0 — 2020-01-11

No release notes.

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## More apps by Victor Bovio

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All apps by Victor Bovio: https://appshunter.io/developer/327627515

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*