206+ iOS apps curated and reviewed
STL Simple Viewer is the household name in stp viewer, but it's far from the only option. We track 206+ alternatives and competitors on iOS β many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.3β (866) | Yes | Yes | Sep 2026 | |
| 2 |  | Free | 4.5β (65) | Yes | Yes | Sep 2026 | |
| 3 |  | Free | 4.5β (4.1K) | No | No | Sep 2026 | |
| 4 |  | Free | 4.9β (7) | No | Yes | Sep 2026 | |
| 5 |  | Free | 4.2β (49) | No | No | May 2026 | |
| 6 |  | Free | 4.4β (340) | No | Yes | Sep 2026 | |
| 7 |  | Free | 4.7β (3.9K) | No | Yes | Sep 2026 | |
| 8 |  | Free | 3.8β (16) | No | No | Sep 2026 |
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 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.
Collaborate on 3D designs from anywhere with this mobile app. View, comment on, and share CAD models in over 100 formats. It works with a companion cloud-based desktop product for product design and development.
