# STL Simple Viewer vs Calque

The clearest difference is ads: Calque at none against STL Simple Viewer's shown. Calque also leads on update cadence (every 3 months vs every 5 months). On price, in-app purchases, device support and iOS requirement 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 and Calque sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

STL Simple Viewer ships an update every 5 months, Calque every 3 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | STL Simple Viewer | Calque |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (917 ratings)](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400/reviews)** | — |
| Number of ratings | **917** | — |
| Positive reviews | 18.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Victor Bovio](https://appshunter.io/developer/327627515) | [Anmol Saxena](https://appshunter.io/developer/6788969782) |

## 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


### Calque

[App page](https://appshunter.io/ios/app/calque-calendar-scanner/id6789638641)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calque Plus (Monthly) | $2.99 | per month |
| Calque Plus (Yearly) | $23.99 | per year |


## Frequently asked questions

### Is STL Simple Viewer free?

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

### Is Calque free?

Calque is free to download, with in-app purchases available.

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

STL Simple Viewer shows ads; Calque does not.

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

STL Simple Viewer ships an update every 5 months, and Calque every 3 months. Most recently, STL Simple Viewer was updated on October 25, 2026 and Calque on October 25, 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.*