250+ iOS apps curated and reviewed
The best stl file viewer pro apps on iPhone average 3.6★ across 250+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.5★ (65) | Yes | Yes | Sep 2026 | |
| 2 |  | Free | 4.3★ (866) | Yes | Yes | Sep 2026 | |
| 3 |  | Free | 4.5★ (48) | No | Yes | Sep 2026 | |
| 4 |  | Free | 4.7★ (3.9K) | No | Yes | Sep 2026 | |
| 5 |  | Free | 4.9★ (7) | No | Yes | Sep 2026 | |
| 6 |  | Free | — | No | Yes | Aug 2026 | |
| 7 |  | Free | 4.5★ (1.1K) | Yes | Yes | Sep 2026 | |
| 8 |  | Free | 3.4★ (5) | No | No | 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.
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.
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.
