Best Cad File Viewer Apps

245+ iOS apps curated and reviewed

3.5 avg rating
19 free apps
Updated October 2026

From beginner-friendly picks to power-user tools, our cad file viewer list covers 245+ iPhone apps updated through October 2026. Compare ratings, prices, and screenshots in one place.

Compare top Cad File Viewer Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1AutoCADAutoCADFree4.4★ (6.3K)NoYesOct 2026
2DWG FastView-CAD Viewer&EditorDWG FastView-CAD Viewer&EditorFree4.5★ (1.1K)YesYesOct 2026
3STL Simple ViewerSTL Simple ViewerFree4.3★ (918)YesYesOct 2026
4CAD FastView: DWG ViewerCAD FastView: DWG ViewerFree4.1★ (56)NoYesOct 2026
5DWG, STL & 3D CAD File ViewerDWG, STL & 3D CAD File ViewerFree5.0★ (1)NoYesOct 2026
6STEP ViewerSTEP ViewerFree1.0★ (1)NoNoOct 2026
7STEP File ViewerSTEP File ViewerFree3.2★ (6)NoYesOct 2026
8CADDaddy: CAD ViewerCADDaddy: CAD Viewer$12.99—NoNoOct 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
DWG FastView-CAD Viewer&Editor screenshot 3
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 STL, 3MF & DXF 3D models
Worth Considering
📊 Productivity
4.3😞(918 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 October 2026, with a 4.4-star average from 6.3K App Store ratings, and it's free to download.
Yes — 19 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 October 2026.
We track 245+ cad file viewer apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.

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