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)NoYesAug 2026
23D File Viewer: OBJ STP & more3D File Viewer: OBJ STP & moreFree4.6★ (48)NoYesAug 2026
3DWG FastView-CAD Viewer&EditorDWG FastView-CAD Viewer&EditorFree4.5★ (1.1K)YesYesAug 2026
4DICOM Viewer : MRI CT XRAY & +DICOM Viewer : MRI CT XRAY & +Free5.0★ (14)NoYesAug 2026
5IDV - IMAIOS DICOM ViewerIDV - IMAIOS DICOM ViewerFree4.7★ (501)NoNoAug 2026
63D Viewer by Chief Architect3D Viewer by Chief ArchitectFree3.7★ (490)NoNoAug 2026
73D Model Viewer - AR View3D Model Viewer - AR ViewFree4.2★ (326)YesYesAug 2026
8Polycam 3D Scans & Floor PlansPolycam 3D Scans & Floor PlansFree4.7★ (43K)NoYesAug 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
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
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
3D File Viewer: OBJ STP & more screenshot 2
3D File Viewer: OBJ STP & more screenshot 3

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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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

Room to Improve

  • 🐛 Crashes and freezes
  • 💰 Subscription model with limited free features
  • 🔒 Lack of customer support and communication

More Image Structure Viewer apps to explore

4
DICOM Viewer : MRI CT XRAY & +
DICOM Viewer : MRI CT XRAY & +
DICOM Viewer : MRI CT XRAY & +
Radiology Medical imaging PACS
Free

This app allows you to view and organize medical imaging studies like MRI and CT scans directly on your iPhone. Import studies from folders or ZIP archives, adjust image settings, add annotations, and sort your research into custom folders for easy access.

Import DICOM studies from folders/ZIPView series and slices with touch navigationAdjust window level/width
🏥 Medical
(14)
free with in-app purchases
5
IDV - IMAIOS DICOM Viewer
IDV - IMAIOS DICOM Viewer
IDV - IMAIOS DICOM Viewer
by IMAIOS
Free

View DICOM medical imaging files from various sources securely on your device. Offers intuitive tools for image manipulation and measurement. Free for personal use, with an online version available.

DICOM file supportImage scrollingImage manipulation
🏥 Medical
(501)
free
6
3D Viewer by Chief Architect
3D Viewer by Chief Architect
3D Viewer by Chief Architect
by Chief Architect
Free

Explore 3D architectural models in virtual reality. Navigate through home designs with intuitive controls, experiencing them before construction. Ideal for professionals to share immersive project previews with clients.

Virtual reality navigationWalk and fly through designsExterior, room, and floor plan views
📊 Productivity
(490)
free
7
3D Model Viewer - AR View
3D Model Viewer - AR View
3D Model Viewer - AR View
View model in AR and 3D mode
Free

View and interact with various 3D model formats in both AR and 3D modes. This intuitive tool supports local and cloud documents, custom backgrounds, and shadow casting. Easily import models via multiple methods and share your creations.

AR and 3D viewing modesSupports numerous 3D file formatsLocal and cloud document integration
📊 Productivity
(326)
free with in-app purchases
8
Polycam 3D Scans & Floor Plans
Polycam 3D Scans & Floor Plans
Polycam 3D Scans & Floor Plans
LiDAR for Measurement & CAD
Free

Create high-quality 3D models, precise LiDAR scans, and immersive 360° images directly from your iPhone or iPad. Edit and export your creations in industry-standard formats, and share them with a global community of creators.

Create high-quality 3D models from photosPrecise LiDAR 3D scanningGenerate detailed 3D room models
📷 Photo & Video
(43K)
free with in-app purchases
9
Emb3D 3D Model Viewer
Emb3D 3D Model Viewer
Emb3D 3D Model Viewer
A Powerful 3D Model Viewer
Free

Explore and showcase your 3D models with advanced rendering and intuitive controls. Supports multiple file formats, ideal for entertainment or preparing models for 3D printing.

High performance renderingIntuitive gesturesMultiple 3D formats
🔧 Utilities
(241)
free with in-app purchases
10
exocad webview
exocad webview
exocad webview
Fast STL 3D Viewer
Free

This free 3D viewer allows you to quickly load and inspect various 3D model file formats on any mobile device. It supports common open formats and offers intuitive controls for adjusting transparency, rotation, and shading. Specialized features are available for dental professionals using specific software.

Load various 3D model formats (STL, OBJ, PLY, etc.)Intuitive touch controlsAdjust mesh transparency and shading
🔧 Utilities
(14)
free
11
Model View 3D - OBJ viewer
Model View 3D - OBJ viewer
Model View 3D - OBJ viewer
Wavefront OBJ file viewer
Free

View 3D models, including textured OBJ files, with adjustable camera controls. Load your own models via iTunes File Sharing and customize backgrounds for presentations or sharing.

View built-in 3D modelsLoad custom OBJ files via iTunesToggle diffuse, normal, and specular textures
🎬 Entertainment
(12)
free
12
CAD FastView: DWG Viewer
CAD FastView: DWG Viewer
CAD FastView: DWG Viewer
DWG,DXF,DWT Viewer -CAD viewer
Free

View, convert, and print CAD drawings on your mobile device. Supports DWG, DXF, and PDF formats with iCloud sync and Wi-Fi printing. Ideal for architects, engineers, and construction professionals.

Fast DWG/DXF viewingConvert drawings to PDFWi-Fi printing
📊 Productivity
(50)
freemium
13
Quick STL Viewer
Quick STL Viewer
Quick STL Viewer
Clean 3D Model Viewer
Free

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.

Instant STL file openingSmooth 3D model explorationRotate and zoom functionality
🔧 Utilities
(7)
free with in-app purchases
14
SketchUp - 3D Modeling
SketchUp - 3D Modeling
SketchUp - 3D Modeling
Interior Design & Architecture
Free

This platform offers intuitive 3D modeling tools for design enthusiasts and professionals. Visualize concepts, create photorealistic visuals, and even use AI to generate design ideas. Scan real-world spaces and view your creations in augmented reality.

3D modeling toolsGenerative AI designsRoom planner & space design
🎨 Graphics & Design
(18K)
free with in-app purchases
15
iRhino 3D
iRhino 3D
iRhino 3D
3D Viewer & Scanner
Free

View and present 3D models from Rhino 3D on your iPhone or iPad. Navigate models with intuitive touch gestures, load files from various sources, and visualize them in augmented reality. Includes a markup tool for annotations.

3D model viewingTouch navigation (pan, zoom, orbit)Cloud storage integration
📊 Productivity
(72)
free
16
File Viewer
File Viewer
File Viewer
by Sharpened Productions
Free

Easily open and view over 100 different file types, including documents, images, videos, and archives. Browse files stored on your device or in iCloud Drive. This app also identifies unknown files and displays detailed file information.

Open 100+ file typesBrowse device and iCloud DriveBuilt-in readers for Office, PDF, and images
🔧 Utilities
(5)
free
17
HTML Viewer Q
HTML Viewer Q
HTML Viewer Q
Lite HTML file management tool
Free

Easily manage and view local HTML files on your device. Import files via iTunes File Sharing, edit them, and utilize features like syntax highlighting and source text search for a streamlined workflow.

iTunes File Sharing importLocal HTML file managementSource text search
🔧 Utilities
(2.6K)
ad-supported
18
3D Model Viewer - AR & Print
3D Model Viewer - AR & Print
3D Model Viewer - AR & Print
Simulate 3D Printing and AR
Free

Explore and interact with 3D models on your mobile device. Simulate the 3D printing process to identify potential issues before committing to a print. Visualize your models in augmented reality, adjusting scale and rotation within your real-world environment.

View 3D models in real-timeRotate, zoom, and paint modelsSimulate 3D printing process
📊 Productivity
(336)
free with in-app purchases
19
Qlone 3D Scanner
Qlone 3D Scanner
Qlone 3D Scanner
Easy, User-Friendly AR Capture
Free

Easily create, edit, and export 3D models from real-world objects using your phone. Enhance your creations with built-in tools and bring them to life in Augmented Reality.

Real-time 3D model creationBuilt-in editing tools (texture, clean, sculpt, shape, art)Augmented Reality (AR) view and animation
🎨 Graphics & Design
(1.6K)
free with in-app purchases
20
KIRI Engine:3D Scanner & LiDAR
KIRI Engine:3D Scanner & LiDAR
KIRI Engine:3D Scanner & LiDAR
Scanning your world with ease
Free

Easily create high-quality 3D models from photos or videos directly on your phone. Offers advanced scanning technologies for detailed results, with editing and export options for various platforms. Ideal for artists, designers, and 3D printing enthusiasts.

Photogrammetry 3D scanningNeural Surface Reconstruction (NSR)3D Gaussian Splatting
📷 Photo & Video
(1.2K)
free with in-app purchases

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.