STEP Viewer vs STL Viewer · Model File Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
STEP Viewer
View and interact with 3D CAD files directly on your mobile device. Measure dimensions, rotate, zoom, and save models in a common format without needing desktop software.
- Open STEP files from file manager
- 3D model measurement tools
- Six fixed views
- Pinch to zoom, pan, and rotate
- Save as GLB
- Progress indicator for large files
- Multilingual support
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STEP Viewer opens STEP (.step, .stp) CAD files in 3D on your phone. No desktop CAD software needed. Everything is free. There are no in-app purchases. Credits only skip the ad; without credits you can still open every file after watching a short ad. Key features * Open .step and .stp files straight from your file manager - just tap the file * Measure your model: a bounding box with all three side lengths, in mm or m * Six fixed views (front, right, back, left, top, bottom), plus pinch to zoom, pan and rotate * Save the converted model as GLB whenever you need it * Large files show the estimated time and memory before conversion starts, and progress while it runs * If a file cannot be opened, the app tells you why instead of failing silently * Available in 12 languages, following your device settings Supported formats * Input: .stp, .step (STEP AP203, AP214) * Output: .glb (glTF Binary) How to use 1. Tap a .step file in your file manager, or open the app and tap the folder icon 2. Wait for the conversion - large files show progress and an estimate 3. Drag to rotate, pinch to zoom, tap the view button to switch sides License This app uses Open CASCADE Technology (LGPL-2.1). https://www.opencascade.com For questions or bug reports, please contact us by email.
STL Viewer · Model File Reader
Quickly view and interact with 3D model files. Rotate, zoom, and project models into your environment using augmented reality. Offers customization options and multi-model support.
- Fast STL file viewing
- 3D model rotation and zoom
- Augmented Reality (AR) projection
- Customizable model and background colors
- Multi-model support
- Grid viewer and lighting options
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View your STL 3D model files at lightning speed. Instantly open even the most complex polygonal structures without delay. Rotate, zoom, change background and model color, multiple models reader, project your model into your home in real life with AR and see its dimensions and color harmony with your environment, grid viewer, lighting and much more. *Note: AR projection, multi models, ad-free and some premium customization features require PRO upgrade. Privacy Policy & Terms of Use (EULA): https://plusapkz.com/stl-viewer-model-file-reader/
Screenshots
Verdict
The clearest difference is rating: STL Viewer · Model File Reader at 5.0 against STEP Viewer's 1.0. STEP Viewer's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price, ratings volume 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 Viewer · Model File Reader sells 3 in-app purchases, starting at $1.99 per 7 days. STEP Viewer asks for nothing beyond the download.
STL Viewer · Model File Reader holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
STEP Viewer ships an update every 5 days, STL Viewer · Model File Reader every 2 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.
| Parameter | STEP Viewer | STL Viewer · Model File Reader |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 5 days — better | Every 2 weeks |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 61 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Smart Cube Labs Co., Ltd. | OMER FARUK KIZILTUG |
In-app purchases
STEP Viewer
No in-app purchases
STL Viewer · Model File Reader
- Weekly Premium3 Days trial$1.997 Days
- Monthly Pro3 Days trial$4.991 Month
- Yearly Pro$19.991 Year
Questions
Is STEP Viewer free?
Is STL Viewer · Model File Reader free?
Which has better reviews, STEP Viewer or STL Viewer · Model File Reader?
Do STEP Viewer or STL Viewer · Model File Reader have ads?
Which is updated more often, STEP Viewer or STL Viewer · Model File Reader?
Other comparisons
