# STP Viewer : STEP 3D — 3D CAD File Reader & Opener

> 3D CAD File Reader & Opener (iPhone/iPad app by CODIGITAL SOLUTIONS - FZCO.)

- Source: https://appshunter.io/ios/app/stp-viewer-step-3d/id6770497525 (this page in markdown: same URL + `.md`)
- Developer: [CODIGITAL SOLUTIONS - FZCO](https://appshunter.io/developer/1829802387)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 44 MB
- Languages: American English
- Released: 2026-06-22
- Data updated: 2026-07-06
- User reviews in markdown: https://appshunter.io/ios/app/stp-viewer-step-3d/id6770497525/reviews.md

## What is STP Viewer?

With our advanced 3D rendering engine, you can open large and complex computer-aided design (CAD) files seamlessly. The app acts as an all-in-one CAD file reader, allowing you to access critical data whenever and wherever you need it.

### Why Choose This STP & STEP Viewer?
Google and web searches often show that finding a lightweight mobile tool to view STEP files can be challenging. Our app solves this by focusing purely on speed, rendering accuracy, and an intuitive user interface. It works flawlessly as both an STP viewer and a STEP viewer, ensuring compatibility with standard ISO 10303 files exported from any modern CAD ecosystem.

### Key Technical Features:
• Comprehensive STP & STEP Support: Fully optimized to read and render both .stp and .step file extensions.
• Fluid 3D Navigation: Experience smooth orbiting, panning, and pinch-to-zoom gestures even with high-polygon assemblies.
• Instant File Loading: Open CAD models directly from your iOS Files app, iCloud Drive, email attachments (Gmail, Outlook), or communication tools like Slack and WhatsApp.
• Structural Integrity: View complex mechanical assemblies and nested components with high visual fidelity.
• Offline Accessibility: Fully functional without an active internet connection. Perfect for secure facilities, remote fields, or offline workshops.
• Battery & RAM Efficient: Engineered using modern mobile graphics frameworks to prevent overheating and excessive battery drain.

### Cross-Platform Ecosystem Compatibility:
This mobile 3D viewer supports files generated from all major CAD software suites. If your workflow involves files exported from any of the following platforms, our app is your ideal mobile companion:
• SolidWorks & Autodesk Fusion 360
• AutoCAD & Autodesk Inventor
• CATIA & PTC Creo
• Rhino 3D & Siemens NX
• TurboCAD, FreeCAD, and more.

### Tailored for Engineering Professionals:
• Mechanical & Aerospace Engineers: Quickly review part tolerances and geometry during team alignment meetings.
• CNC Programmers & Machinists: Verify 3D model structures directly next to the machine without running back to a computer.
• Sales & Project Managers: Showcase highly detailed interactive 3D prototypes to clients during sales pitches and presentations.
• 3D Printing Enthusiasts: Check standard CAD exports before sending them to slicing software.

### Flexible Premium Plans:
Gain unlimited access to advanced viewing features, large file processing, and a completely ad-free workspace. Choose the subscription model that aligns with your professional workflow:
• Weekly Plan: Ideal for short-term design reviews, sudden project deadlines, or quick freelance jobs.
• Monthly Plan: Great for ongoing manufacturing sprints, contract work, and mid-term engineering projects.
• Yearly Plan: Our best-value option providing year-round, uninterrupted access for dedicated CAD professionals and engineering teams.


Privacy Policy: https://sites.google.com/view/stepviewerpolicy/home
Terms of Service: https://sites.google.com/view/stp-viewer-appterms/home

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro Access | $1.99 | per 7 days |
| Pro Access | $4.99 | per month |
| Pro Access | $9.99 | per year |



## Version history (last 1 release)

### 1.0 — 2026-06-22

No release notes.

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All apps by CODIGITAL SOLUTIONS - FZCO: https://appshunter.io/developer/1829802387

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-06.*