# STL Simple Viewer vs Atos CONNECT

The clearest difference is rating: Atos CONNECT at 5.0 against STL Simple Viewer's 4.3. Atos CONNECT also leads on in-app purchases (none vs 4) and ads (none vs shown). STL Simple Viewer's advantage is ratings volume (923 vs 3). On price and device support there is nothing between them.

Both are free to download. STL Simple Viewer sells 4 in-app purchases, starting at $0.99 per 7 days. Atos CONNECT asks for nothing beyond the download.

Atos CONNECT holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: STL Simple Viewer has 923 ratings behind it against 3, so its average is the more settled of the two.

STL Simple Viewer ships an update every 5 months, Atos CONNECT every 2 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | STL Simple Viewer | Atos CONNECT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (923 ratings)](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/atos-connect/id6450599144/reviews)** |
| Number of ratings | **923** | 3 |
| Positive reviews | 18.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 19 MB | 59 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Victor Bovio](https://appshunter.io/developer/327627515) | [Atos spa](https://appshunter.io/developer/1693997386) |

## What reviewers say

### STL Simple Viewer

[App page](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400)

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.

**Highlights:** 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

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro version (1 week plan) | $0.99 | per 7 days |
| Pro version (1 month plan) | $1.99 | per month |
| Remove Ads | $2.99 | one-time |
| Export Pack | $3.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

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

**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

**Requested features**

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


### Atos CONNECT

[App page](https://appshunter.io/ios/app/atos-connect/id6450599144)

This app offers a smart and quick way to configure and diagnose hydraulic devices directly from your smartphone or tablet. It supports device identification, password protection, status overview, and parameter adjustments. An oscilloscope and alarm history are also included for comprehensive management.

**Highlights:** Device identification, Password setup, Device status overview, Parameter adjustment, Oscilloscope, Alarms history, Offline demo mode

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is STL Simple Viewer free?

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

### Is Atos CONNECT free?

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

### Which has better reviews, STL Simple Viewer or Atos CONNECT?

Atos CONNECT is rated higher. STL Simple Viewer averages 4.3 out of 5 from 923 ratings, while Atos CONNECT averages 5.0 from 3 ratings.

### Do STL Simple Viewer or Atos CONNECT have ads?

STL Simple Viewer shows ads; Atos CONNECT does not.

### Which is updated more often, STL Simple Viewer or Atos CONNECT?

STL Simple Viewer ships an update every 5 months, and Atos CONNECT every 2 months. Most recently, STL Simple Viewer was updated on November 7, 2026 and Atos CONNECT on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*