3D Model Viewer vs STEP Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
3D Model Viewer
Easily view and interact with 3D models in various formats like USDZ, STL, and OBJ. Explore your designs with intuitive gestures, high-performance rendering, and augmented reality capabilities. Record animations of your models for sharing.
- View USDZ, STL, OBJ, PLY files
- Intuitive gesture controls
- High-performance rendering
- Augmented Reality (AR) visualization
- Record rotation animations
- Supports OBJ with textures
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3D Model Viewer: STL & USDZ - Transform Your Experience with 3D Visualization! Key Features: - Seamless Viewing: Effortlessly open and explore .usdz, .usd, .obj, .stl, .ply files with stunning clarity and detail. Experience 3D models like never before! - User-Friendly Interface: Navigate through your 3D models with simple gestures. Rotate, zoom and pan. - High Performance: Enjoy smooth and fast rendering, ensuring an optimal viewing experience for complex models. - AR Viewer: Visualize your models in AR. - Record: Record the scene with a rotation animation. You can upload .obj with textures, you need to create a zip file with the textures and the .mtl file. Download 3D Model Viewer: STL & USDZ today and step into the future of 3D visualization! Transform the way you see and share your creative ideas. Payment will be charged to your Apple ID account at the confirmation of purchase. The subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your App Store account settings after purchase. - Terms & conditions https://sites.google.com/view/usdz3dviewer/home/termsandconditions
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.
Screenshots
Verdict
The clearest difference is rating: 3D Model Viewer at 3.5 against STEP Viewer's 1.0. 3D Model Viewer also leads on ratings volume (11 vs 1). STEP Viewer's advantage is in-app purchases (none vs 4) and iOS requirement (13.0 vs 17.0). On price, update cadence, ads 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. 3D Model Viewer sells 4 in-app purchases, starting at $2.99 per 7 days. STEP Viewer asks for nothing beyond the download.
3D Model Viewer holds the better App Store score, 3.5 against 1.0. That said, the two scores are not equally well evidenced: 3D Model Viewer has 11 ratings behind it against 1, so its average is the more settled of the two.
3D Model Viewer ships an update weekly, STEP Viewer every 5 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | 3D Model Viewer | STEP Viewer |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (11 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 11 — better | 1 |
| Update frequency | Weekly | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 15 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | Ariel Ortiz | Smart Cube Labs Co., Ltd. |
In-app purchases
3D Model Viewer
- All Access$2.997 Days
- All Access3 Days trial$3.991 Month
- All Access$14.991 Year
- One-time payment$3.99
STEP Viewer
No in-app purchases
Questions
Is 3D Model Viewer free?
Is STEP Viewer free?
Which has better reviews, 3D Model Viewer or STEP Viewer?
Do 3D Model Viewer or STEP Viewer have ads?
Which is updated more often, 3D Model Viewer or STEP Viewer?
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