250+ iOS apps curated and reviewed
STL File Viewer Pro is the household name in fast stl viewer, but it's far from the only option. We track 250+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.5★ (65) | Yes | Yes | Aug 2026 |
| 2 |  | Free | 4.9★ (7) | No | Yes | Aug 2026 |
| 3 |  | Free | 4.3★ (866) | Yes | Yes | Aug 2026 |
| 4 |  | Free | — | Yes | Yes | Aug 2026 |
| 5 |  | Free | — | No | Yes | Aug 2026 |
| 6 |  | Free | — | Yes | Yes | Jul 2026 |
| 7 |  | Free | 4.2★ (49) | No | No | May 2026 |
| 8 |  | Free | — | Yes | Yes | Jul 2026 |
Easily view, rotate, and inspect 3D STL files on your iPhone or iPad. Load models instantly from various sources for 3D printing, design review, or engineering inspection.
Instantly open and preview 3D STL files with a smooth, responsive interface. Explore models by rotating and zooming, switch to wireframe mode, and customize colors for better visibility. This app offers a distraction-free viewing experience for checking models or print details on the go.
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.
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.
View and interact with 3D models in augmented reality. Share instant screenshots and screen recordings of your designs directly from the app.
This app quickly displays large image files, including scanned documents and engineering drawings, directly from cloud storage or your camera roll. It excels at viewing bitonal images with optimized decoding for fast navigation. The free version includes ads, while a paid version offers printing and PDF conversion.
Easily open and explore 3D model files on your iPhone or iPad. Supports over 20 popular formats, offering smooth viewing with intuitive touch controls. Ideal for designers, engineers, architects, and students working with 3D data.
A professional reader for image and e-book enthusiasts, this app offers a versatile reading experience across multiple devices. It supports over 20 file formats, advanced image processing, and flexible reading modes, with extensive cloud storage integration.
