STL Simple Viewer vs AI Viewer
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
AI Viewer
View Adobe Illustrator (.ai) files on your mobile device without needing a license. Convert .ai files to PDF or PNG, zoom in on previews, and easily locate Illustrator files stored on your device.
- Preview .ai files
- Save as PDF or PNG
- List all .ai files on device
- Pinch to zoom
- Remove ads permanently
- Contact support
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AIViewer app can preview .ai files created using Adobe illustrator. View Adobe illustrator files on your iPhone/iPad without buying costly license. Using AI Viewer, you can do the following - 1. Preview all pages of Adobe illustrator(.ai) files. Language supported : English, Korean, Thai and more are coming soon. 2. Save .ai file as .pdf file or .png image into mobile device. 3. List all Adobe illustrator(.ai) present in mobile device. 4. Pinch to zoom to show large preview. 5. In-app purchases: to remove full page advertisement permanently during application use. 6. Contact Us : In case of any query feel free to contact us at support@magicapps.co.in or use contact us button provided in application. Terms of use(EULA) : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: STL Simple Viewer at 4.3 against AI Viewer's 2.9. STL Simple Viewer also leads on ratings volume (909 vs 14). AI Viewer's advantage is update cadence (fortnightly vs every 5 months) and review sentiment (29% vs 18%). On price, ads, in-app purchases and monetization model 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 and AI Viewer sells 1 in-app purchase, starting at $24.99 per year. Whichever you choose, the download price is not the number that matters.
STL Simple Viewer holds the better App Store score, 4.3 against 2.9. That said, the two scores are not equally well evidenced: STL Simple Viewer has 909 ratings behind it against 14, so its average is the more settled of the two. Written reviews complicate that: 18% of STL Simple Viewer's written reviews are positive against 29% of AI Viewer's, so the app with the better star average is not the one people write more warmly about.
STL Simple Viewer ships an update every 5 months, AI Viewer fortnightly. The most recent releases landed on October 21, 2026 and September 21, 2026 respectively.
| Parameter | STL Simple Viewer | AI Viewer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (909 ratings) — better | 2.9 (14 ratings) |
| Positive reviews | 18.1% of reviews | 28.6% of reviews — better |
| Number of ratings | 909 — better | 14 |
| Update frequency | Every 5 months | Fortnightly — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 19 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Victor Bovio | Vaibhav Singhal |
Customer experience
STL Simple Viewer
AI Viewer
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
AI Viewer
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
AI Viewer
- Yearly Subscription$24.991 Year
Questions
Is STL Simple Viewer free?
Is AI Viewer free?
Which has better reviews, STL Simple Viewer or AI Viewer?
Do STL Simple Viewer or AI Viewer have ads?
Which is updated more often, STL Simple Viewer or AI Viewer?
Other comparisons
