Best Image Structure Viewer Apps

0+ iOS apps curated and reviewed

4.3 avg rating
20 free apps
Updated July 2026

Whether you're new to image structure viewer or looking for an upgrade, our curated collection of 0+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Compare top Image Structure Viewer Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1AutoCADAutoCADFree4.4★ (6.3K)NoYesSep 2026
23D File Viewer: OBJ STP & more3D File Viewer: OBJ STP & moreFree4.5★ (48)NoYesSep 2026
3DWG FastView-CAD Viewer&EditorDWG FastView-CAD Viewer&EditorFree4.5★ (1.1K)YesYesSep 2026
4DICOM Viewer : MRI CT XRAY & +DICOM Viewer : MRI CT XRAY & +Free5.0★ (14)NoYesSep 2026
5IDV - IMAIOS DICOM ViewerIDV - IMAIOS DICOM ViewerFree4.7★ (504)NoNoSep 2026
63D Viewer by Chief Architect3D Viewer by Chief ArchitectFree3.7★ (490)NoNoSep 2026
73D Model Viewer - AR View3D Model Viewer - AR ViewFree4.2★ (328)YesYesAug 2026
8Polycam 3D Scans & Floor PlansPolycam 3D Scans & Floor PlansFree4.7★ (43K)NoYesSep 2026

Top Picks for Image Structure 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
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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
3D File Viewer: OBJ STP & more#2

3D File Viewer: OBJ STP & more by Andeesh Mehdi Syed

STP STL OBJ FBX GLTF & More
Strong Contender
🔧 Utilities
4.5(48 ratings)
FreeIn-App Purchases
3D File Viewer: OBJ STP & more screenshot 1
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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.

DWG FastView-CAD Viewer&Editor#3

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

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

More Image Structure Viewer apps to explore

FAQ about Image Structure Viewer

What are the best image structure viewer apps for iPhone?
AutoCAD tops our image structure viewer apps ranking as of July 2026, with a 4.4-star average from 6.3K App Store ratings, and it's free to download.
Yes — 20 of the top image structure viewer apps we rank are free to download, including AutoCAD and 3D File Viewer: OBJ STP & more.
AutoCAD has no ads and offers in-app purchases, according to its App Store listing as of July 2026.
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.