# STL Simple Viewer vs Upsway

The clearest difference is rating: Upsway at 5.0 against STL Simple Viewer's 4.3. Upsway also leads on in-app purchases (none vs 4) and ads (none vs shown). STL Simple Viewer's advantage is ratings volume (909 vs 1). 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. Upsway asks for nothing beyond the download.

Upsway 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 909 ratings behind it against 1, so its average is the more settled of the two.

STL Simple Viewer ships an update every 5 months, Upsway monthly. The most recent releases landed on October 16, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | STL Simple Viewer | Upsway |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (909 ratings)](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/upsway/id6450484583/reviews)** |
| Number of ratings | **909** | 1 |
| Positive reviews | 18.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 19 MB | 24 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Victor Bovio](https://appshunter.io/developer/327627515) | [Riise Opco LLC](https://appshunter.io/developer/1642466487) |

## 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


### Upsway

[App page](https://appshunter.io/ios/app/upsway/id6450484583)

Facilitate seamless collaboration and project management with an intuitive interface. Assign roles, manage tasks, and customize workflows for efficient team communication across departments. Ideal for organizations needing structured project oversight and design feedback.

**Highlights:** Intuitive interface for design file commenting, Role-based access and team management, Simplified project management, Task assignment and tracking, Customizable workflows, File versioning and collaboration tools

**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 Upsway free?

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

### Which has better reviews, STL Simple Viewer or Upsway?

Upsway is rated higher. STL Simple Viewer averages 4.3 out of 5 from 909 ratings, while Upsway averages 5.0 from 1 ratings.

### Do STL Simple Viewer or Upsway have ads?

STL Simple Viewer shows ads; Upsway does not.

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

STL Simple Viewer ships an update every 5 months, and Upsway monthly. Most recently, STL Simple Viewer was updated on October 16, 2026 and Upsway on October 3, 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.*