Best Cad File Viewer Apps

247+ iOS apps curated and reviewed

3.7 avg rating
17 free apps
Updated September 2026

From beginner-friendly picks to power-user tools, our cad file viewer list covers 247+ iPhone apps updated through September 2026. Compare ratings, prices, and screenshots in one place.

Compare top Cad File Viewer Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1AutoCADAutoCADFree4.4★ (6.3K)NoYesSep 2026
2DWG FastView-CAD Viewer&EditorDWG FastView-CAD Viewer&EditorFree4.5★ (1.1K)YesYesSep 2026
3STL Simple ViewerSTL Simple ViewerFree4.3★ (866)YesYesSep 2026
4CAD FastView: DWG ViewerCAD FastView: DWG ViewerFree4.0★ (50)NoYesSep 2026
5STEP ViewerSTEP ViewerFreeNoNoSep 2026
6Glovius - 3D CAD File ViewerGlovius - 3D CAD File ViewerFree1.0★ (1)NoYesJul 2026
7STP Viewer : STEP 3DSTP Viewer : STEP 3DFreeNoYesJul 2026
8CAD Converter ViewerCAD Converter ViewerFreeNoYesAug 2026

Top Picks for Cad File Viewer

AutoCAD#1

AutoCAD by Autodesk Inc.

DWG Viewer & Editor
Editor's Choice
📊 Productivity
4.4😞(6.3K ratings)
FreeIn-App Purchases
AutoCAD screenshot 1
AutoCAD screenshot 2
AutoCAD screenshot 3
AutoCAD screenshot 4
AutoCAD screenshot 5
AutoCAD screenshot 6

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.

What We Love

  • 🚀 Intuitive and easy to learn
  • 📱 Convenient mobile solution
  • 👍 Great for site visits and field work
  • 🔍 Useful for viewing and marking up drawings

Room to Improve

  • 🐛 Crashes frequently
  • 🔒 Difficult login and account management
  • 🔍 Limited functionality compared to desktop version
  • 📱 Lacks basic CAD features like hatching and dimensioning
  • 💰 Expensive subscription model
DWG FastView-CAD Viewer&Editor#2

DWG FastView-CAD Viewer&Editor by Gstarsoft Co., Ltd

* Support 2D/3D CAD formats
Strong Contender
📊 Productivity
4.5😐(1.1K ratings)
FreeAdsIn-App Purchases
DWG FastView-CAD Viewer&Editor screenshot 1
DWG FastView-CAD Viewer&Editor screenshot 2
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DWG FastView-CAD Viewer&Editor screenshot 4
DWG FastView-CAD Viewer&Editor screenshot 5
DWG FastView-CAD Viewer&Editor screenshot 6

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.

What We Love

  • 🚀 Fast and efficient
  • 👍 Easy to use and intuitive
  • 💡 Convenient mobile CAD viewing and editing
  • 🚀 Quick file loading
  • 👍 Smooth performance
  • 👍 Accurate measurements and annotations
  • 💡 Useful PDF export feature

Room to Improve

  • 🐛 Crashes and freezes
  • 💰 Subscription model with limited free features
  • 🔒 Lack of customer support and communication
  • 🔒 Unclear upgrade and purchase process
  • 🔒 Aggressive advertising and paywalls
  • 🔒 Unreliable file compatibility and opening
STL Simple Viewer#3

STL Simple Viewer by Victor Bovio

View 3D STL & 3MF CAD models
Worth Considering
📊 Productivity
4.3😞(866 ratings)
FreeAdsIn-App Purchases
STL Simple Viewer screenshot 1
STL Simple Viewer screenshot 2
STL Simple Viewer screenshot 3
STL Simple Viewer screenshot 4

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.

What We Love

  • 🚀 Simple and intuitive viewer
  • 👍 Useful viewing options
  • 💡 Supports multiple file formats

Room to Improve

  • 🐛 Frequent crashes
  • 🔋 High battery consumption
  • 🚨 Excessive and intrusive ads
  • 🔍 Limited functionality for larger files

More Cad File Viewer apps to explore

FAQ about Cad File Viewer

What are the best cad file viewer apps for iPhone?
AutoCAD tops our cad file viewer apps ranking as of September 2026, with a 4.4-star average from 6.3K App Store ratings, and it's free to download.
Yes — 17 of the top cad file viewer apps we rank are free to download, including AutoCAD and DWG FastView-CAD Viewer&Editor.
AutoCAD has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 247+ cad file viewer apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
The official AutoCAD mobile app allows you to view and edit CAD drawings (DWG files) anytime, anywhere. It provides essential drafting and design capabilities for everyday needs, enabling you to access, create, and update drawings directly from your mobile device.
Key features include 2D file viewing, creating and editing 2D drawings, working offline with later syncing, inserting blocks, managing layers, drafting and geometry editing tools, annotation and markup tools, and measurement tools for distance, angle, area, and radius.

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