# STL Simple Viewer vs Mobileraker

The clearest difference is review sentiment: Mobileraker at 81% against STL Simple Viewer's 18%. Mobileraker also leads on rating (4.9 vs 4.3) and update cadence (every 5 weeks vs every 5 months). On price, ratings volume, ads and in-app purchases 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 Mobileraker sells 10 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Mobileraker holds the better App Store score, 4.9 against 4.3. Both are backed by a comparable volume of ratings — 909 and 904 respectively. Written reviews point the same way: 18% of STL Simple Viewer's written reviews are positive against 81% of Mobileraker's.

STL Simple Viewer ships an update every 5 months, Mobileraker every 5 weeks. The most recent releases landed on October 21, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | STL Simple Viewer | Mobileraker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (909 ratings)](https://appshunter.io/ios/app/stl-simple-viewer/id1493598400/reviews) | **[4.9 (904 ratings)](https://appshunter.io/ios/app/mobileraker-klipper-ui/id1581451248/reviews)** |
| Number of ratings | **909** | 904 |
| Positive reviews | 18.1% of reviews | **81.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 19 MB | 130 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Victor Bovio](https://appshunter.io/developer/327627515) | [Patrick Schmidt](https://appshunter.io/developer/1624526745) |

## 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


### Mobileraker

[App page](https://appshunter.io/ios/app/mobileraker-klipper-ui/id1581451248)

Control and monitor your Klipper 3D printer from your mobile device. Features include real-time print visualization, precision control, advanced monitoring, and file management.

**Highlights:** Real-time print visualization, Precision axis and temperature control, Advanced monitoring dashboard, Filament system management, Multi-printer fleet control, File management, Macro control

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Supporter | $1.99 | per month |
| Base | $4.99 | per month |
| Gold | $9.99 | per month |
| Yearly Supporter | $19.99 | per year |
| Tip the Dev | $2.00 | one-time |
| Tip the Dev | $4.00 | one-time |
| Tip the Dev | $9.00 | one-time |
| Tip the Dev | $22.00 | one-time |
| Lifetime Supporter Promotion | $29.99 | one-time |
| Lifetime Supporter | $39.99 | one-time |

**What reviewers like**

- 🚀 Responsive and fast
- 👍 Great user interface
- 💡 Excellent Klipper support
- 🔒 Secure remote access
- 👍 Versatile monitoring and control

**What reviewers complain about**

- 🐛 Occasional connectivity issues
- 💰 Ads in free version
- 🔒 Concerns about monetization

**Reported bugs**

- Webcam not working when printer is off
- Socket errors and timeouts

**Requested features**

- Customizable dashboard layout
- Persistent temperature/time prediction display
- Apple Watch integration
- Decimal support for temperature adjustments


## Frequently asked questions

### Is STL Simple Viewer free?

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

### Is Mobileraker free?

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

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

Mobileraker is rated higher. STL Simple Viewer averages 4.3 out of 5 from 909 ratings, while Mobileraker averages 4.9 from 904 ratings.

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

Both STL Simple Viewer and Mobileraker show ads.

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

STL Simple Viewer ships an update every 5 months, and Mobileraker every 5 weeks. Most recently, STL Simple Viewer was updated on October 21, 2026 and Mobileraker on October 18, 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.*