192+ iOS apps curated and reviewed
The best stl file viewer pro apps on iPhone average 4.0★ across 192+ titles — we've ranked them by what real users actually keep on their phones. Updated May 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.
This app consolidates 3D model searching, viewing, and slicing from major platforms into a single interface. It allows users to find, preview, organize, and prepare STL files for 3D printing, streamlining the entire workflow.
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.
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.
This cross-platform CAD application allows users to view, edit, and create 2D and 3D designs on the go. It supports a wide range of file formats and offers advanced tools for precise drawing, measurement, and annotation, even offline.
View and interact with 3D models in augmented reality. Share instant screenshots and screen recordings of your designs directly from the app.
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.
View, analyze, and collaborate on 3D CAD files directly from your mobile device. Supports numerous popular CAD formats and offers tools for measurements, reporting, and team feedback.
View and interact with various 3D model formats in both AR and 3D modes. This intuitive tool supports local and cloud documents, custom backgrounds, and shadow casting. Easily import models via multiple methods and share your creations.
This app offers robust PDF editing and viewing capabilities, alongside comprehensive file management tools. It allows users to annotate PDFs, manage files from various cloud services, and secure sensitive data with advanced encryption. Enjoy a superior reading experience with features like PDF Reflow and split-screen viewing.
This app allows you to store, view, and manage files on your iPhone. It offers a built-in document viewer, supports various file types, and enables easy file transfers via USB, Wi-Fi, and cloud services.
Consolidate and manage local and cloud files within one app. View, save, and transfer documents, presentations, media, and more across multiple cloud services and your device.
Easily open and view over 100 different file types, including documents, images, videos, and archives. Browse files stored on your device or in iCloud Drive. This app also identifies unknown files and displays detailed file information.
Easily open and view Winmail.dat, MSG, and XPS email files that are incompatible with most email clients. Convert embedded content like appointments and notes into native iOS formats, and access all attachments within these files.
Easily open and play various file formats directly from compressed archives without needing to decompress them. Supports numerous media and document types, offering a simple interface for file management and access.
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 manage your files by unzipping and archiving documents, photos, and videos. Browse and view various file types directly within the app. Offers premium features for advanced file operations and security.
This app acts as a virtual USB drive and file manager for your iPhone and iPad. It allows you to easily view, organize, and share various document types, including Office and iWorks files, as well as media. It also offers cloud integration and secure file protection.
View and manage documents from various office suites, including Hangul, Word, Excel, and PowerPoint. Convert documents to PDF or image files, and share them via email. Supports a wide range of file formats.