Best Concepts Diagram Apps

187+ iOS apps curated and reviewed

4.1 avg rating
17 free apps
Updated July 2026

If you already know Lucidchart, this is the deeper bench. 187+ concepts diagram apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of July 2026.

Compare top Concepts Diagram Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1LucidchartLucidchartFree4.6★ (5.3K)YesNoAug 2026
2Diagram: Daily Concept SummaryDiagram: Daily Concept SummaryFree5.0★ (1)NoNoMay 2026
3Free-Body DiagramFree-Body DiagramFreeNoNoMay 2026
4DrawExpress Diagram LiteDrawExpress Diagram LiteFree3.6★ (22)NoNoJul 2026
5Diagrams Notepad 3Diagrams Notepad 3Free was $22.993.5★ (51)NoYesMay 2026
6MindFlow - Struct Flow DiagramMindFlow - Struct Flow DiagramFree4.4★ (31)YesYesMay 2026
7EdrawMax - AI Diagram MakerEdrawMax - AI Diagram MakerFree3.7★ (28)NoYesJul 2026
8Xmind: AI Mind Map, BrainstormXmind: AI Mind Map, BrainstormFree4.8★ (7K)NoYesAug 2026

Top Picks for Concepts Diagram

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 and view diagrams like flowcharts, mind maps, and org charts on your mobile device. This visual workspace facilitates real-time collaboration and data visualization. Diagrams sync instantly to your account and can be exported in various formats.

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
Diagram: Daily Concept Summary#2

Diagram: Daily Concept Summary by Hugo Peyron

Learn concepts daily
Strong Contender
📚 Education
5.0(1 ratings)
Free
Diagram: Daily Concept Summary screenshot 1
Diagram: Daily Concept Summary screenshot 2
Diagram: Daily Concept Summary screenshot 3
Diagram: Daily Concept Summary screenshot 4

Discover new concepts daily across 10 categories including business, economy, and psychology. Interactive swiping, breathing breaks, and quizzes enhance memory retention. New content is added regularly to keep learning fresh.

More Concepts Diagram apps to explore

4
DrawExpress Diagram Lite
DrawExpress Diagram Lite
DrawExpress Diagram Lite
by DrawExpress Inc
Free

Create diagrams and flowcharts quickly and intuitively using simple gestures. Ideal for software design, business, and academic needs, it offers a pen-and-paper like experience for various diagram types.

Gesture-based diagrammingFlowchart creationUML diagramming
📊 Productivity
(22)
free
5
Diagrams Notepad 3
Diagrams Notepad 3
Diagrams Notepad 3
Diagram - Flowchart - Mind Map
Free
$22.99 | 100% OFF

Create and sync diagrams, flowcharts, and mind maps across iPhone, iPad, and Mac. Supports Apple Pencil for drawing and offers collaboration features. Export in various formats.

Cross-device sync via iCloudVector-based shapes and connectorsApple Pencil support
📊 Productivity
(51)
free with in-app purchases
6
MindFlow - Struct Flow Diagram
MindFlow - Struct Flow Diagram
MindFlow - Struct Flow Diagram
simple struct and flow diagram
Free

Easily create structure and flow diagrams with a simple interface. Edit branches, change shapes and themes, and export your creations. Cloud backup and sync across devices are also supported.

Quick diagram buildingEasy branch editingCustomizable branch shapes
📊 Productivity
(31)
free with in-app purchases
7
EdrawMax - AI Diagram Maker
EdrawMax - AI Diagram Maker
EdrawMax - AI Diagram Maker
Drawing Struct, Org, Flowchart
Free

This AI-powered diagramming tool transforms your ideas into professional visuals effortlessly. Create flowcharts, org charts, mind maps, and more with extensive templates and smart AI assistance. Collaborate seamlessly and export to various formats.

Photo to editable diagram conversionAI-powered diagram generation40,000+ templates and 17,000+ symbols
📊 Productivity
(28)
free with in-app purchases
8
Xmind: AI Mind Map, Brainstorm
Xmind: AI Mind Map, Brainstorm
Xmind: AI Mind Map, Brainstorm
Outline, Plan, Notes & Slides
Free

This app is a comprehensive tool for mind mapping and brainstorming, helping users organize thoughts, manage projects, and visualize information. It offers various structures, templates, and customization options to enhance creativity and productivity. Collaborate in real-time and export your work in multiple formats.

30+ Templates9 Structure TypesAudio Notes
📊 Productivity
(7K)
free with in-app purchases
9
Bubble Diagram Maker
Bubble Diagram Maker
Bubble Diagram Maker
Quick Mind-Map & Venn Tool
Free

Create visual diagrams for planning, conceptual thinking, and organization. Easily arrange and customize elements to bring your ideas to life without complex tools. Save and share your creations privately.

Tap & Drag CreationFull Customization (color, size, label)Unlimited Diagrams
🔧 Utilities
(7)
free
10
Grafio 4 - Diagram Maker
Grafio 4 - Diagram Maker
Grafio 4 - Diagram Maker
Sketch, chart & explain ideas
$9.99

Easily create diagrams, charts, and visual explanations of your ideas. This app features automatic shape recognition, a vast library of stencils, and the ability to add audio notes and images to your creations. It's designed for intuitive use by everyone, not just professionals.

Automatic shape recognitionDrag and drop stencilsEmbed images
📊 Productivity
(252)
paid
11
MindNode – Classic
MindNode – Classic
MindNode – Classic
Mind Mapping, Brainstorm Ideas
Free

Capture, organize, and visualize your thoughts and ideas. This app allows you to brainstorm, structure complex projects, and share your vision in various formats. Stay productive across all your devices with seamless iCloud integration.

Capture thoughts as text, images, links, or tasksOrganize ideas with hierarchical outlines and mind mapsStyle mind maps with themes and stickers
📊 Productivity
(1.9K)
free with in-app purchases
12
DrawExpress Diagram
DrawExpress Diagram
DrawExpress Diagram
by DrawExpress Inc
$7.99

Create diagrams and flowcharts intuitively using simple gestures, similar to drawing with pen and paper. This app supports various diagram types for software design, business, and education. Export your creations in multiple formats.

Gesture-based drawingDiagram and flowchart creationSupports UML, BPMN, Mind Maps
📊 Productivity
(30)
free with in-app purchases
13
Flowdia Diagrams
Flowdia Diagrams
Flowdia Diagrams
Flowchart & Diagramming
Free

Create professional flowcharts, mind maps, and various other diagrams with an intuitive interface. Easily connect shapes, add elements, and customize your designs. Export your work in multiple formats, including PNG, JPG, PDF, and SVG.

Create flowcharts, mind maps, BPMN, and network diagramsIntuitive shape connection and element additionCustomizable shape appearance
📊 Productivity
(65)
free with in-app purchases
14
Mind Mapping
Mind Mapping
Mind Mapping
Brainstorm with ease
Free

Organize your thoughts and ideas into structured visual formats like mind maps, flowcharts, and outlines. This app offers extensive customization, sharing, and export options for seamless idea management.

Diagrams and mind mapsFlowcharts and outlinesMultiple color themes and styles
📊 Productivity
(343)
subscription
15
Draw Pad Pro - Sketch Notes
Draw Pad Pro - Sketch Notes
Draw Pad Pro - Sketch Notes
Amazing Notepads & Sketchbooks
Free
$4.99 | 100% OFF

This app provides a digital space for capturing thoughts, ideas, and sketches. It offers extensive customization and productivity tools, with sharing capabilities, designed for seamless use across all your devices.

Note takingSketchingIdea management
📊 Productivity
(159)
free with in-app purchases
16
MarkChart - Mermaid Editor
MarkChart - Mermaid Editor
MarkChart - Mermaid Editor
Mermaid diagrams
Free

This app allows you to easily create and preview diagrams using a Markdown-inspired text syntax. It offers templates for various diagram types and supports automatic updates when used with external editors. Export your creations to common image formats.

Mermaid diagram editingReal-time previewBuilt-in templates
🛠️ Developer Tools
(13)
free with in-app purchases
17
Electrical Diagram Maker
Electrical Diagram Maker
Electrical Diagram Maker
Electrical schematic maker
Free
🔧 Utilities
(0)
18
Flow Chart, Block Diagram
Flow Chart, Block Diagram
Flow Chart, Block Diagram
FlowChart & Workflow Creator
Free

Easily create complex flowcharts and diagrams on a tablet with an automatic layout algorithm and shape recognition. Design professional business graphics using a variety of smart shapes for different diagram types, then export your creations to multiple formats.

Automatic layout algorithmHand-drawn shape recognitionHundreds of pre-designed smart shapes
📊 Productivity
(11)
free with in-app purchases
19
Lekh: whiteboard & diagramming
Lekh: whiteboard & diagramming
Lekh: whiteboard & diagramming
Diagram & Flowchart Maker
Free

This app provides an infinite canvas for freehand drawing and creating various diagrams. It intelligently converts sketches into precise shapes and connections, supporting a wide range of diagram types for business, design, and planning.

Infinite canvas for drawingSmart diagram and flowchart creationLayout and inspection report drawing
📊 Productivity
(14)
free with in-app purchases
20
Venn Diagram Shader
Venn Diagram Shader
Venn Diagram Shader
Learn Set Theory of Shading
$2.99
$4.99 | 40% OFF

Create and shade Venn diagrams with up to seven sets. This mathematical tool automatically generates set notation expressions and provides step-by-step shading instructions for algebraic expressions. Export your diagrams for further editing.

Create Venn diagrams (1-7 sets)Shade or unshade areasAutomatic set notation display
📚 Education
(21)
paid

FAQ about Concepts Diagram

What are the best concepts diagram apps for iPhone?
Lucidchart tops our concepts diagram apps ranking as of July 2026, with a 4.6-star average from 5.3K App Store ratings, and it's free to download.
Yes — 17 of the top concepts diagram apps we rank are free to download, including Lucidchart and Diagram: Daily Concept Summary.
Lucidchart shows ads and has no in-app purchases, according to its App Store listing as of July 2026.
We track 187+ concepts diagram apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
Lucidchart is a visual workspace that allows users to create and collaborate on various types of diagrams, including flowcharts, mind maps, org charts, and UML diagrams. It facilitates data visualization and real-time teamwork to enhance understanding and drive innovation.
The app allows you to create and edit documents, start with pre-built templates, and use drag-and-drop functionality. It also offers offline viewing of recent documents, real-time collaboration with in-editor commenting, and easy sharing options.