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Best Diagramas Apps

202+ iOS apps curated and reviewed

3.7 avg rating
16 free apps
Updated June 2026

Carmin is the household name in diagramas, but it's far from the only option. We track 202+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Top Picks for Diagramas

Carmin#1

Carmin by Chuan Nguyen Van

Automotive Wiring Diagrams
Editor's Choice
🔍 Reference
4.3😐(175 ratings)
FreeAdsIn-App Purchases
Carmin screenshot 1
Carmin screenshot 2
Carmin screenshot 3
Carmin screenshot 4
Carmin screenshot 5
Carmin screenshot 6

Access a comprehensive library of regularly updated automotive electrical wiring diagrams for car repair and study. Includes videos and technical documents for research and reference.

What We Love

  • 📚 Comprehensive vehicle diagram database
  • 💰 Free version available with good content
  • 🎯 Helpful for car diagnostics and repairs
  • ⚡ Quick access to wiring information

Room to Improve

  • 📺 Excessive advertisements in free version
  • 🐛 Frequent app crashes and instability on iOS
  • 🚫 Limited vehicle coverage (missing years and models)
Seat parts and diagrams#2

Seat parts and diagrams by Inna Chornaya

Strong Contender
🛍️ Shopping
2.3(3 ratings)
FreeIn-App Purchases
Seat parts and diagrams screenshot 1
Seat parts and diagrams screenshot 2
Seat parts and diagrams screenshot 3
Seat parts and diagrams screenshot 4
Seat parts and diagrams screenshot 5
Seat parts and diagrams screenshot 6

Access comprehensive information on spare parts and accessories for Seat cars. View detailed diagrams of your vehicle's components and easily locate any part. Find your car by VIN code for precise part identification.

More Diagramas apps to explore

4
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
5
Grapholite Diagrams Maker
Grapholite Diagrams Maker
Grapholite Diagrams Maker
FlowChart & Infographics
Free

Create a wide range of business graphics and technical drawings, from simple sketches to professional documents. Features include freehand drawing recognition, extensive stencil libraries, and advanced connection routing. Export to various formats like PDF, PNG, SVG, and Visio.

Flow chart creationFloor plan designNetwork layout diagrams
💼 Business
(8)
free with in-app purchases
6
Lucidchart
Lucidchart
Lucidchart
Flowchart & Diagram Maker
Free

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.

Create and edit diagramsPre-built templatesDrag-and-drop functionality
📊 Productivity
(5.3K)
free with in-app purchases
7
Hydraulic schemes
Hydraulic schemes
Hydraulic schemes
Easily draw hydraulic schemes
$0.99

Easily design hydraulic, heating, cooling, and air conditioning schematics. Drag and drop symbols to quickly build your diagrams. Save and edit your work with the PRO version.

Create hydraulic schemesDrag and drop symbol placementExtensive symbol library
📊 Productivity
(24)
free with in-app purchases
8
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
9
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
10
Hairtechapp - Cutting Diagrams
Hairtechapp - Cutting Diagrams
Hairtechapp - Cutting Diagrams
Draw Head Sheets For Haircuts
$17.99

Create professional haircutting diagrams with custom head sheets and drawing tools. Organize client designs, refine techniques, and improve consultations. Perfect for stylists of all levels.

Customizable head sheetsDrawing tools (lines, arrows, text)Specialized clipper/razor stickers
📚 Education
(41)
free
11
Lunar and Emotional Diagram
Lunar and Emotional Diagram
Lunar and Emotional Diagram
by Dietmar Herbert Schwarz Webers
$1.99
💪 Health & Fitness
(1)
12
Flowchart AI
Flowchart AI
Flowchart AI
AI-powered Flowchart Creation
Free
💼 Business
(0)
13
TrazaVolt
TrazaVolt
TrazaVolt
by MARIANO RAFAEL JIMENEZ PADILLA
Free
📊 Productivity
(0)
14
Geometric Art Pictures
Geometric Art Pictures
Geometric Art Pictures
Geometric aesthetic wallpaper
Free

Create unique and ever-changing geometric art with intuitive controls. Generate stunning visuals for wallpapers, designs, or sharing, with options for random or custom creations. Export in various formats and sizes.

Random geometric art generationCustomizable themes and parametersWallpaper preview
🎨 Graphics & Design
(2)
free with in-app purchases
15
Electrician Handbook — Basics
Electrician Handbook — Basics
Electrician Handbook — Basics
Electric circuit, voltage, ohm
Free
$5.99 | 100% OFF

This app provides electricians, students, and installers with essential electrical theory, interactive diagrams, and practical calculators. It includes a community forum for users to share knowledge and seek advice, all accessible offline without ads or subscriptions.

Electrical theory topicsInteractive circuit diagramsCalculators and formulas
🔍 Reference
(965)
free
16
ER Diagram AI
ER Diagram AI
ER Diagram AI
AI makes ER diagrams easy
Free
$4.99 | 100% OFF

Design and visualize database schemas effortlessly with AI assistance. Quickly generate schemas from outlines, make detailed adjustments, and convert diagrams to SQL for various databases. Ideal for new development, reviews, collaboration, and learning.

AI-assisted schema generationAutomatic SQL conversionIntuitive editing
🛠️ Developer Tools
(1)
freemium
17
Pie Diagrams by iMathics
Pie Diagrams by iMathics
Pie Diagrams by iMathics
by Alexandra Hamburg
Free

Easily create and customize pie and meter charts with an intuitive interface. The app allows for direct data entry and real-time preview, with options to modify colors and duplicate existing charts for further editing. Print your creations directly from your device.

Create pie and meter chartsIntuitive chart creationTable editor for data entry
💼 Business
(36)
free
18
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
19
Every Diagram AI
Every Diagram AI
Every Diagram AI
Easily Create Diagrams with AI
Free
💼 Business
(0)
20
Simple Flowchart
Simple Flowchart
Simple Flowchart
Create Flowcharts Easily.
Free
💼 Business
(0)