Comparison

STL Simple Viewer vs Calque

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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

About

Calque

Features
Read full description

The calendar on your fridge is probably the most accurate one you own, and it syncs to nothing. Calque fixes that. photograph the wall calendar, the paper planner, the whiteboard grid at work. it finds the grid, reads what's written in each box, and hands you a list of events to check before anything touches your real calendar. you fix the one it misread, toss the one about someone else's dentist, and add the rest to your calendar or share an .ics anywhere. Two ways to read: The free tier runs entirely on your device. the photo never leaves your phone, full stop. it's honest work, best with printed or neat handwriting. Calque Plus ($2.99/month or $23.99/year) sends the photo to a cloud model that reads real handwriting, the kind where "soccer 4:30" slants uphill into the margin. 200 scans a month, which is a lot of fridge calendars. images are processed and deleted, and your scan history lives on your device, not our servers. Either way you review before anything is saved. Calque writes ink colors to matching calendars too, so the red pen stays the family calendar and the blue pen stays work. one subscription covers the app and calque.ponderance.dev. No accounts needed for the free tier. no ads, no tracking, no selling your data. it reads your calendar, that's it. terms of use: https://ponderance.dev/terms privacy policy: https://ponderance.dev/privacy

Screenshots

STL Simple Viewer4 screens
Calque3 screens

Verdict

The call

The clearest difference is ads: Calque at none against STL Simple Viewer's shown. Calque also leads on update cadence (every 3 months vs every 5 months). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. STL Simple Viewer sells 4 in-app purchases, starting at $0.99 per 7 days and Calque sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

STL Simple Viewer ships an update every 5 months, Calque every 3 months. Both last shipped on October 25, 2026.

Scorecard2 real differences · 8 level
STL Simple Viewer versus Calque: the parameters behind the verdict, then further details
ParameterSTL Simple ViewerCalque
PriceFreeFree
Rating4.3 (917 ratings) — better—
Positive reviews18.1% of reviews—
Number of ratings917 — better—
Update frequencyEvery 5 monthsEvery 3 months — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size19 MB2 MB
Age rating4+4+
DeveloperVictor BovioAnmol Saxena

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

Calque

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

STL Simple Viewer

Subscriptions2
  • Pro version (1 week plan)$0.997 Days
  • Pro version (1 month plan)3 Days trial$1.991 Month
One-time2
  • Remove Ads$2.99
  • Export Pack$3.99
2 purchases

Calque

Subscriptions2
  • Calque Plus (Monthly)$2.991 Month
  • Calque Plus (Yearly)$23.991 Year

Questions

Is STL Simple Viewer free?
STL Simple Viewer is free to download, with in-app purchases available.
Is Calque free?
Calque is free to download, with in-app purchases available.
Do STL Simple Viewer or Calque have ads?
STL Simple Viewer shows ads; Calque does not.
Which is updated more often, STL Simple Viewer or Calque?
STL Simple Viewer ships an update every 5 months, and Calque every 3 months. Most recently, STL Simple Viewer was updated on October 25, 2026 and Calque on October 25, 2026.

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