STL Simple Viewer vs CopyCal
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
CopyCal
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Your work calendar lives somewhere you can't sync from. Outlook on a locked-down laptop. A roster taped to the break-room wall. A schedule your employer won't connect to your phone. CopyCal fixes that with a photo. Point your camera at any calendar — a screen, a printout, a whiteboard — and CopyCal reads the events and mirrors them into your iPhone calendar. Titles, start and end times, locations. RE-SHOOT AND IT UPDATES Photograph the same week again after your schedule changes. CopyCal compares what it sees against what it added last time, then shows you exactly what will change: added, updated, removed. Nothing touches your calendar until you approve it. YOU STAY IN CONTROL • Review every single change before it's applied • Tap any event to correct a title or time • Deselect anything you don't want • Undo an entire sync from your history • CopyCal only ever modifies events it created — your personal events are never touched WORKS WITH WHAT YOU ALREADY USE Outlook, Google Calendar, Apple Calendar, Microsoft Teams, Samsung Calendar, Fantastical, Notion Calendar and more. Single day or a full week at a time. CHOOSE WHERE EVENTS LAND Send events to any calendar on your device. A dedicated "Work" calendar keeps your schedule tidy and easy to hide. PRIVACY Your calendar photo is processed only to extract the events and is not kept on our servers. Email addresses spotted inside events are stripped automatically. No ads, no tracking, nothing sold. FREE AND PRO Free includes one sync every 14 days. CopyCal Pro removes the limit entirely: • $4.99 per month • $39.99 per year Payment is charged to your Apple Account at confirmation of purchase. Your subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. Your Apple Account is charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription in your Apple Account settings after purchase. Terms of Use: https://calcopy.app/terms Privacy Policy: https://calcopy.app/privacy
Screenshots
Verdict
The clearest difference is ads: CopyCal at none against STL Simple Viewer's shown. On price, in-app purchases, device support and iOS requirement 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 CopyCal sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | STL Simple Viewer | CopyCal |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (917 ratings) — better | — |
| Positive reviews | 18.1% of reviews | — |
| Number of ratings | 917 — better | — |
| Update frequency | Every 5 months | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 19 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Victor Bovio | NILSON LINS |
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
CopyCal
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
CopyCal
- CopyCal Pro Monthly$4.991 Month
- CopyCal Pro Yearly$39.991 Year









