190+ iOS apps curated and reviewed
The best step file viewer apps on iPhone average 4.1★ across 190+ titles — we've ranked them by what real users actually keep on their phones. Updated May 2026.
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.
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.
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.
Access and edit CAD drawings on the go with this official application. It provides essential drafting and design tools for creating, updating, and sharing 2D drawings from any device. Collaborate with teams and simplify workflows by accessing files from various cloud storage services.
Explore and showcase your 3D models with advanced rendering and intuitive controls. Supports multiple file formats, ideal for entertainment or preparing models for 3D printing.
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.
This app provides comprehensive file management for iPhones and iPads, allowing users to view, share, and organize documents, media, and contacts. It supports a wide range of file formats and offers features like multi-window support and WiFi sharing.
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 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.
Easily view and export 3D CAD files in IGES and STEP formats. Supports various export options and offers advanced rendering controls for detailed analysis of your models.
Manage files across your devices and cloud storage. Access and transfer documents, photos, and media from computers, NAS, and cloud services directly on your iPhone or iPad without downloading.
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 is a versatile file manager for iOS devices, offering comprehensive file operations, a built-in browser with advanced download capabilities, and viewers for a wide range of file types. It supports various import/export methods and customizable gestures for efficient use.
This platform offers intuitive 3D modeling tools for design enthusiasts and professionals. Visualize concepts, create photorealistic visuals, and even use AI to generate design ideas. Scan real-world spaces and view your creations in augmented reality.
This app is a comprehensive file manager and document editor for mobile devices. It allows users to organize, edit, convert, and annotate various file types, including PDFs, Office documents, and audio/video files. It also features transcription, scanning, and cloud integration.
Manage local and network files with this comprehensive tool. It offers file transfer, compression, built-in media players, cloud storage integration, and editing capabilities for various document and code formats.
Access and manage files from local storage, network shares, and cloud services. Stream media, view documents, and transfer files seamlessly across devices. Offers advanced network tools and editing capabilities.