Best Diagram Concept Apps

194+ iOS apps curated and reviewed

3.9 avg rating
17 free apps
Updated July 2026

Out of 194+ diagram concept apps on iOS, 17 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Top Picks for Diagram Concept

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 Diagram Concept 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
Free-Body Diagram
Free-Body Diagram
Free-Body Diagram
MasterStatics Concepts Anytime
Free
📚 Education
(0)
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
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
9
Xmind: AI Mind Map, Brainstorm
Xmind: AI Mind Map, Brainstorm
Xmind: AI Mind Map, Brainstorm
全功能的思维导图和头脑风暴效率工具,理清思路,捕捉灵感
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
10
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
(3)
free
11
Mind Map Flow - Concept Mapper
Mind Map Flow - Concept Mapper
Mind Map Flow - Concept Mapper
Visual Thinking Idea Organizer
Free

Organize thoughts, plan projects, and brainstorm ideas visually. Create clear mind maps to connect concepts, improve focus, and think more effectively. Features simple editing and an intuitive interface for quick idea expansion.

Create mind maps easilyVisual idea organizationAdd branches and nodes
🔧 Utilities
(1)
free
12
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
13
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
14
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
15
MarkChart - Mermaid Editor
MarkChart - Mermaid Editor
MarkChart - Mermaid Editor
Markdown 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
(12)
free with in-app purchases
16
Electrical Diagram Maker
Electrical Diagram Maker
Electrical Diagram Maker
Electrical schematic maker
Free
🔧 Utilities
(0)
17
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
18
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
19
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
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