Best Diagram Viewer Mobile Apps

182+ iOS apps curated and reviewed

4.0 avg rating
16 free apps
Updated June 2026

With an average user rating of 4.0★, the diagram viewer mobile category is one of the App Store's strongest. Browse all 182+ apps we track, sorted so the most loved ones surface first.

Top Picks for Diagram Viewer Mobile

Lucidchart#1

Lucidchart by Lucid Software Inc

Flowchart & Diagram Maker
Editor's Choice
📊 Productivity
4.6😞(5.3K ratings)
FreeAdsIn-App Purchases
Lucidchart screenshot 1
Lucidchart screenshot 2
Lucidchart screenshot 3
Lucidchart screenshot 4
Lucidchart screenshot 5

Create professional flowcharts and diagrams easily with our intuitive application. Collaborate with team members in real-time and streamline your workflow for improved productivity. Try it now and enhance your visual communication!

What We Love

  • 🚀 Intuitive interface
  • 👍 Great for creating diagrams and flowcharts
  • 💡 Useful templates and shapes

Room to Improve

  • 🐛 Frequent crashes and bugs
  • 🔒 Locked features behind paywall
  • 👎 Poor mobile experience compared to web version
AutoCAD#2

AutoCAD by Autodesk

DWG Viewer & Editor
Strong Contender
📊 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

View and edit AutoCAD drawings on the go! Access all DWG files, annotate, measure, and share designs easily. Download now to streamline your workflow.

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
ZWCAD Mobile - Mobile CAD#3

ZWCAD Mobile - Mobile CAD by ZWCAD Software Co.,Ltd.

DWG viewer and editor
Worth Considering
📊 Productivity
4.3😊(302 ratings)
FreeIn-App Purchases
ZWCAD Mobile - Mobile CAD screenshot 1
ZWCAD Mobile - Mobile CAD screenshot 2
ZWCAD Mobile - Mobile CAD screenshot 3
ZWCAD Mobile - Mobile CAD screenshot 4
ZWCAD Mobile - Mobile CAD screenshot 5

A powerful mobile CAD app offering DWG viewing, editing, and sharing functions, with precise measurement, annotation, and printing capabilities. Trusted by over 10 million users, it supports various file formats and provides a wide range of editing, drawing, and measuring tools for architects, engineers, and construction professionals. Contact for more information: tech@zwsoft.com.

What We Love

  • 🚀 Fast and efficient
  • 👍 User-friendly interface
  • 💡 Convenient cloud integration
  • 🚀 Smooth performance even with large files

Room to Improve

  • 🐛 Crashes and stability issues after updates
  • 🔒 Login and registration problems
  • 🔋 High battery consumption

More Diagram Viewer Mobile apps to explore

4
CAD FastView: DWG Viewer
CAD FastView: DWG Viewer
CAD FastView: DWG Viewer
DWG Viewer - DWG/DXF Reader
Free

This multifunctional CAD drawing viewing and sharing application allows users to quickly view, share, and manage DWG drawings, with features like PDF conversion, cloud synchronization, and Wi-Fi printing. It is ideal for professionals like architects, engineers, and contractors who need to effortlessly handle various CAD drawing formats and tasks.

📊 Productivity
(33)
5
DWG FastView-CAD Viewer&Editor
DWG FastView-CAD Viewer&Editor
DWG FastView-CAD Viewer&Editor
* Support 2D/3D CAD formats
Free

DWG FastView-CAD Viewer allows users to view, edit, and share CAD drawings on mobile devices with ease. This intuitive app enables quick access to important design files anytime, anywhere. Access professional-grade features on-the-go and streamline your CAD workflow today.

📊 Productivity
(50)
6
Grafio 4 - Diagram Maker
Grafio 4 - Diagram Maker
Grafio 4 - Diagram Maker
Sketch, chart & explain ideas
$9.99

Create professional diagrams and sketches easily with this powerful diagram maker app. Visualize ideas, workflows, and plans effortlessly. Download now to streamline your diagramming process!

📊 Productivity
(252)
7
DrawExpress Diagram Lite
DrawExpress Diagram Lite
DrawExpress Diagram Lite
by DrawExpress Inc
Free
📊 Productivity
(22)
8
EdrawMax - AI Diagram Maker
EdrawMax - AI Diagram Maker
EdrawMax - AI Diagram Maker
Drawing Struct, Org, Flowchart
Free

Here is a rewritten version of the description in a couple of sentences: "Create professional diagrams and flowcharts with ease using AI-powered tools. Start designing your idea today and transform your thoughts into visual masterpieces!" Let me know if you'd like me to make any adjustments!

📊 Productivity
(28)
9
Model View 3D - OBJ viewer
Model View 3D - OBJ viewer
Model View 3D - OBJ viewer
Wavefront OBJ file viewer
Free

This 3D model viewer allows users to view and interact with a variety of 3D models, including textured and normal mapped models, and even import their own models using iTunes File Sharing. Users can customize their viewing experience by adjusting camera angles, toggling textures, and selecting from various backgrounds, making it easy to showcase 3D models to others.

🎬 Entertainment
(12)
10
Diagrams Notepad 3
Diagrams Notepad 3
Diagrams Notepad 3
Diagram - Flowchart - Mind Map
Free
$22.99 | 100% OFF
📊 Productivity
(51)
11
VSD Viewer for Visio Drawings
VSD Viewer for Visio Drawings
VSD Viewer for Visio Drawings
by Nektony LLC
$9.99
💼 Business
(9)
12
STL File Viewer Pro
STL File Viewer Pro
STL File Viewer Pro
Simplest Way To View STL Files
Free

View and interact with your 3D STL models with ease, rotating, zooming, and inspecting them with smooth and intuitive gestures. Download now to explore your 3D models in a comfortable and efficient way, perfect for 3D printing, CAD modeling, and more.

🛠️ Developer Tools
(50)
13
MiTek® Mobile Viewer
MiTek® Mobile Viewer
MiTek® Mobile Viewer
by MiTek Industries, Inc.
Free

This application allows users to receive and interact with 3D models on their Apple device, enabling them to control visibility, take virtual tours, and collaborate with designers. Users can identify issues, capture and share images or print hardcopies for comparison with actual site conditions, enhancing productivity and collaboration.

📊 Productivity
(25)
14
Achoo HTML Viewer & Inspector
Achoo HTML Viewer & Inspector
Achoo HTML Viewer & Inspector
Tweak page, and customizable!
$0.99

Experience the convenience of browsing and viewing HTML files on the go with our user-friendly application. Simply upload your HTML files to access them anytime, anywhere with ease.

🔧 Utilities
(328)
15
exocad webview
exocad webview
exocad webview
Fast STL 3D Viewer
Free

Load 3D models quickly and easily in a free viewer that supports common file formats like STL, OBJ, and PLY. Seamlessly view and adjust 3D meshes on any mobile device, with features like mesh transparency and texture mapping, and try it out for free without registration.

🔧 Utilities
(14)
16
Lexy PDF Viewer-Maker,Builder
Lexy PDF Viewer-Maker,Builder
Lexy PDF Viewer-Maker,Builder
by MONSTER SHOW NETWORK TECHNOLOGY LIMITED
Free

The application is a versatile PDF viewer and creator that allows users to easily convert photos, text, and album pictures into high-quality PDF files. With its intuitive interface and quick conversion capabilities, it simplifies the process of managing and sharing documents, making work more efficient and convenient.

🎨 Graphics & Design
(128)
17
Mermaid Editor - MMChart Live
Mermaid Editor - MMChart Live
Mermaid Editor - MMChart Live
Markdown, flowchart, diagram
Free
🛠️ Developer Tools
(11)
18
DrawExpress Diagram
DrawExpress Diagram
DrawExpress Diagram
by DrawExpress Inc
$7.99

This diagram application allows users to easily create a variety of diagrams and flowcharts with a simple and intuitive gesture-recognition interface. Try out the free version to see how it can meet your diagramming needs for software design, business processes, and more.

📊 Productivity
(30)
19
P7M Viewer
P7M Viewer
P7M Viewer
Digital Signature File Viewer
Free

View, manage, and verify P7M digital signature files easily with this application. Import files from various sources, view content, and certificate signers, and export or print files effortlessly. Additionally, view PDF PAdES signatures and details. Share feedback or suggestions with maguolo.ios@outlook.com.

💼 Business
(337)
20
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 models in AR and 3D mode using this advanced model viewer. Enjoy features like custom backgrounds, shadow casting, and support for multiple file formats. Share and save screenshots, access files locally or from the cloud, and get detailed model information. For feedback or support, email belighten@gmail.com.

📊 Productivity
(323)