# STL Simple Viewer vs Moku

The clearest difference is rating: Moku at 5.0 against STL Simple Viewer's 4.3. Moku also leads on in-app purchases (none vs 4) and ads (none vs shown). STL Simple Viewer's advantage is ratings volume (866 vs 6). 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. Moku asks for nothing beyond the download.

Moku 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 866 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 17% of STL Simple Viewer's written reviews are positive against 50% of Moku's.

STL Simple Viewer ships an update every 20 months, Moku every 2 months. The most recent releases landed on September 26, 2026 and August 8, 2026 respectively.

## The numbers

| Metric | STL Simple Viewer | Moku |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (866 ratings)](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/moku/id1553672887/reviews)** |
| Number of ratings | **866** | 6 |
| Positive reviews | 17.2% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 20 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 19 MB | 2.1 GB |
| Requires iOS | 17.0 | **15.0** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | +4 | 4+ |
| Developer | [Victor Bovio](https://appshunter.io/developer/327627515) | [Liquid Instruments](https://appshunter.io/developer/956412035) |

## 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 to OBJ, DAE, DXF, PLY | $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


### Moku

[App page](https://appshunter.io/ios/app/moku/id1553672887)

This platform provides professional-grade scientific and engineering instruments on an iPad. It offers 16 versatile tools, including oscilloscopes and spectrum analyzers, with advanced customization options. Seamlessly control experiments, stream data, and share findings wirelessly.

**Highlights:** 16 professional-grade instruments, Customizable test setups, Wireless iPad control, Real-time data streaming, Cloud and email data sharing, Demo mode with simulated signals

**Features:** Vision Pro support

**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 Moku free?

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

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

Moku is rated higher. STL Simple Viewer averages 4.3 out of 5 from 866 ratings, while Moku averages 5.0 from 6 ratings.

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

STL Simple Viewer shows ads; Moku does not.

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

STL Simple Viewer ships an update every 20 months, and Moku every 2 months. Most recently, STL Simple Viewer was updated on September 26, 2026 and Moku on August 8, 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.*