31+ iOS apps curated and reviewed
Out of 31+ stp file apps on iOS, 18 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.5★ (35) | Yes | Yes | Jul 2026 |
| 2 |  | Free | — | No | No | Jul 2026 |
| 3 |  | Free | 4.4★ (1K) | Yes | Yes | Jul 2026 |
| 4 |  | Free | 4.4★ (6.3K) | No | Yes | Jul 2026 |
| 5 |  | Free | 3.3★ (13) | No | No | May 2026 |
| 6 |  | Free | 1.0★ (1) | No | Yes | Jul 2026 |
| 7 |  | Free | 4.4★ (50) | Yes | Yes | Jul 2026 |
| 8 |  | Free | 2.1★ (10) | No | No | May 2026 |
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.
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.
Easily view, analyze, and share 3D CAD models and drawings from various file formats. Organize your models into a catalog for quick reference and access job information. Streamline your quoting process by leveraging past projects and profitability data.
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.
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.
This app offers comprehensive file management capabilities, including offline access, FTP/SFTP client functionality, and a robust text editor. It supports various file types, background transfers, and secure connections, making it a versatile tool for managing and editing documents on the go.
Order your favorite wings, tenders, sandwiches, and sides for pickup or delivery. Customize your order, reorder past favorites, and find nearby locations. Enjoy convenient payment options.
This application allows users to view, measure, and annotate CAD files and PDFs. It supports multiple drawing formats and offers tools for collaboration, including image and voice annotations. Convert PDFs to CAD and manage layers with advanced features.
Access your Outlook emails offline by transferring PST files to your device. Browse, search, and manage your messages without an internet connection. View attachments, reply to emails, and even access contacts stored within the PST file.
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 create and edit plain text files with this simple, lightweight editor. Manage multiple documents simultaneously, save content automatically, and share files directly via email attachments.
Manage servers and files remotely with this app. It offers secure SSH and SFTP connections, file management, and an interactive terminal. Transfer files, run commands, and edit documents on the go.
Access and manage files on remote SFTP servers directly from your mobile device. Integrates seamlessly with the iOS Files app, making cloud and home network files accessible to all compatible applications. An optional in-app purchase unlocks unlimited server connections and premium features.
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.
This app provides real-time bus schedules and route information for Montevideo. Find bus lines connecting two points, locate addresses, and discover card recharge stations. Avoid waiting at bus stops unnecessarily.
Access your TP-Link router's internal storage and connected USB drives remotely. Securely manage, download, and upload files from anywhere with an internet connection. Offers private and convenient file management without relying on cloud services.