# STL Viewer: Measure 3D Files — Preview models before printing

> Preview models before printing (iPhone/iPad app by Vladimir Lukashov.)

- Source: https://appshunter.io/ios/app/stl-viewer-measure-3d-files/id6812732656 (this page in markdown: same URL + `.md`)
- Developer: [Vladimir Lukashov](https://appshunter.io/developer/6783697231)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 10 MB
- Languages: American English
- Released: 2026-09-23
- Data updated: 2026-10-14

## What is STL Viewer?

Open an STL file on your iPhone or iPad to inspect the model in 3D. Rotate, zoom and move around it, or switch to a standard view. You can preview your first imported file for free before subscribing.

STL Viewer Pro
• Import more models and keep them in a library on your device.
• Check the overall X, Y and Z dimensions.
• Choose the source units and convert measurements between millimeters, centimeters, meters, inches and feet.
• Share an image of the model with its overall dimensions.

Opening and viewing files
Open ASCII or binary STL files from Files or the system Open In menu. Show the mesh edges, switch to front, back, left, right, top or bottom views, and fit the model to the screen. The app supports files up to 50 MB and 1 million triangles.

Your files
STL Viewer displays and measures models on your device. It has no accounts or ads, does not upload models and leaves your original files unchanged.

STL files do not contain units, so you need to choose the units used to export the file. Measurements describe the model's axis-aligned bounding box. The app does not edit CAD files, slice models or check printability.

Subscriptions
Pro has monthly and yearly plans that renew automatically. Apple charges your Apple Account. To stop renewal, cancel at least 24 hours before the current period ends. Manage or cancel your subscription in App Store settings. If you already subscribe, you can restore purchases.

Privacy: https://stlviewer.vovaluka.com/privacy
Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| STL Viewer Pro Monthly | $3.99 | per month |
| STL Viewer Pro Yearly | $24.99 | per year |


## Is STL Viewer safe?

Not enough ratings yet to assess STL Viewer.

## Is STL Viewer legit?

STL Viewer: Measure 3D Files appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for STL Viewer is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-09-23

No release notes.

## Apps similar to STL Viewer

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [GLTF Viewer · Convert OBJ/STL](https://appshunter.io/ios/app/gltf-viewer-convert-objstl/id6776793016) | 5.0 (1) | Free | Utilities |
| [3D File Converter: STL & 3MF](https://appshunter.io/ios/app/3d-file-converter-stl-and-3mf/id6801810344) | — | Free | Utilities |
| [LayerLab](https://appshunter.io/ios/app/layerlab/id6762074190) | — | Free | Utilities |
| [SoniJi](https://appshunter.io/ios/app/soniji/id6757489889) | — | Free | Utilities |
| [Meshly: STL Viewer](https://appshunter.io/ios/app/meshly-stl-viewer/id6792144429) | — | Free | Utilities |
| [USDZ to STL & OBJ Converter](https://appshunter.io/ios/app/usdz-to-stl-and-obj-converter/id6759488005) | — | Free | Utilities |

## More apps by Vladimir Lukashov

- [Candle & Soap Calculator](https://appshunter.io/ios/app/candle-and-soap-calculator/id6783697229)
- [Tee Time Alerts: Golf Booking](https://appshunter.io/ios/app/tee-time-alerts-golf-booking/id6784973886)
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- [Daysworth: Daily Budget](https://appshunter.io/ios/app/daysworth-daily-budget/id6787101947)
- [Duct Calculator: HVAC Sizing](https://appshunter.io/ios/app/duct-calculator-hvac-sizing/id6789039757)
- [HVAC Load Calc: Manual J](https://appshunter.io/ios/app/hvac-load-calc-manual-j/id6789243124)

All apps by Vladimir Lukashov: https://appshunter.io/developer/6783697231

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-14.*