STL Simple Viewer vs Saturn
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
STL Simple Viewer
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.
- 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
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STL Simple Viewer is a great app to quickly view STL, 3MF & DXF 3D files and export them to the most commonly used CAD formats. Features: - Supports STL files both ASCII and Binary formats. - Supports 3MF & DXF files. - Load files directly from ZIP archives. - Export to DXF, OBJ, DAE, PLY, USD, STL & 3MF. - Measure distances between points within your model. - Rotate, pan, and zoom models with intuitive touch controls. - Configure rendering options: faces, edges, points, background and transparency. - Render using a clipping plane (useful for viewing model interiors). - View models in Orthographic or Perspective mode. - Obtain model information including triangle count, bounding box, surface area, and volume. Privacy Policy: https://www.boviosoft.com/apps/privacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ For support or questions: support@boviosoft.com
Saturn
Easily sketch your ideas with intuitive 3D drawing tools. Capture patterns from photos and trace their outlines for unique creations. Experience a novel way to bring your imagination to life on your device.
- 3D ruler for scaling, rotating, and translating
- Draw outlines of 3D objects
- Capture patterns from photos
- Trace outlines of patterns
- Simple drawing interface
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You may want to sketch your thoughts. It might be a table, a fan, or anything. Let’s draw your mind out in a simple way! Saturn offers some useful tools for you to draw the outline of 3D object. Imagine you have a 3D ruler in the app. You can scale, rotate and translate it on the canvas. You may see a fun pattern in a patch of cloud. It might be a whale, or an elephant. Let's take a picture of it. Saturn offers some useful tools for you to find the outline of the pattern. This will be a brand new drawing experience!
Screenshots
Verdict
The clearest difference is review sentiment: Saturn at 100% against STL Simple Viewer's 18%. Saturn also leads on rating (5.0 vs 4.3) and in-app purchases (none vs 4). STL Simple Viewer's advantage is ratings volume (923 vs 3). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. STL Simple Viewer sells 4 in-app purchases, starting at $0.99 per 7 days. Saturn asks for nothing beyond the download.
Saturn 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. Written reviews point the same way: 18% of STL Simple Viewer's written reviews are positive against 100% of Saturn's.
STL Simple Viewer ships an update every 5 months, Saturn every 5 days. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.
| Parameter | STL Simple Viewer | Saturn |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (923 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 18.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 923 — better | 3 |
| Update frequency | Every 5 months | Every 5 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 19 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Victor Bovio | Cheuk Yin Lau |
Customer experience
STL Simple Viewer
Saturn
Bugs and requests
STL Simple Viewer
Reported bugs
3 issues- 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
3 requests- Add ability to save color/lighting settings
- Improve stability and reduce crashes
- Provide an ad-free paid version
Saturn
Not enough reviews yet to summarise bugs or requests.
In-app purchases
STL Simple Viewer
- Pro version (1 week plan)$0.997 Days
- Pro version (1 month plan)3 Days trial$1.991 Month
- Remove Ads$2.99
- Export Pack$3.99
Saturn
No in-app purchases
