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Best Diagramas Apps

250+ iOS apps curated and reviewed

3.7 avg rating
17 free apps
Updated July 2026

Carmin is the household name in diagramas, but it's far from the only option. We track 250+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Diagramas Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1CarminCarminFree4.3★ (223)YesYesAug 2026
2Autowire - Car Wiring DiagramsAutowire - Car Wiring DiagramsFree—NoYesAug 2026
3Seat parts and diagramsSeat parts and diagramsFree2.3★ (3)NoYesAug 2026
4Flowdia DiagramsFlowdia DiagramsFree3.4★ (66)NoYesAug 2026
5Xm DiagramsXm DiagramsFree3.0★ (1)NoNoJul 2026
6SimurelaySimurelayFree3.9★ (17)NoYesAug 2026
7SourceCanvasSourceCanvas$5.99—NoNoJul 2026
8Hydraulic schemesHydraulic schemes$0.993.9★ (24)NoYesJul 2026

Top Picks for Diagramas

Carmin#1

Carmin by Chuan Nguyen Van

Automotive Wiring Diagrams
Editor's Choice
🔍 Reference
4.3😐(223 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#3

Seat parts and diagrams by Inna Chornaya

Worth Considering
🛍️ 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
(66)
free with in-app purchases
5
Xm Diagrams
Xm Diagrams
Xm Diagrams
by Tramontana Szamitastechnikai Korlatolt Felelossegu Tarsasag
Free

Access detailed automotive information for the Citroën Xm, including schematic diagrams, wiring layouts, and technical data. Features include an ORGA calculator, error code readouts, and a fuse voltage drop calculator.

Schematic diagrams and wiring layoutsWiring harnesses informationEngine, fluids, and filter data
🔍 Reference
(1)
free
6
Simurelay
Simurelay
Simurelay
by Abdessamed Benkabouya
Free

Design and simulate electromechanical systems with a wide range of basic electrical components. Create detailed electrical diagrams using relays, switches, buttons, contactors, and timers.

Design electromechanical systemsSimulate electrical diagramsBasic electrical components library
📚 Education
(17)
free with in-app purchases
7
SourceCanvas
SourceCanvas
SourceCanvas
Preview SVG code instantly
$5.99
🔧 Utilities
(0)
8
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
9
Diagram Designer - for Graphic
Diagram Designer - for Graphic
Diagram Designer - for Graphic
Flowchart MindMapping Workflow
$9.99

Create flowcharts, mind maps, and various diagrams with intuitive gesture recognition. Ideal for software design, business, finance, and education. A free lite version is available to test before purchasing.

Gesture recognition for drawingFlowchart creationMind mapping
🔧 Utilities
(0)
paid
10
Every Diagram AI
Every Diagram AI
Every Diagram AI
Easily Create Diagrams with AI
Free
💼 Business
(0)
11
Simple Sequence Diagram AI
Simple Sequence Diagram AI
Simple Sequence Diagram AI
AI Sequence Diagram Creator
Free
🛠️ Developer Tools
(0)
12
PrivyMermaid: AI Diagram
PrivyMermaid: AI Diagram
PrivyMermaid: AI Diagram
Generate, Fix & Edit Diagrams
Free

This privacy-focused editor allows developers and technical writers to create, edit, and preview diagrams completely offline. Your sensitive data remains on your device, ensuring maximum security and control over your diagrams.

100% Private & Offline diagram editingInstant offline diagram renderingNo cloud sync for enhanced data privacy
🛠️ Developer Tools
(0)
free
13
Handy Diagram
Handy Diagram
Handy Diagram
AI-Transformed Diagrams
Free
📊 Productivity
(0)
14
tldiagram
tldiagram
tldiagram
by mert can cikla
Free
🛠️ Developer Tools
(0)
15
DiagramIQ
DiagramIQ
DiagramIQ
Interactive STEM Learning
Free
📚 Education
(0)
16
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
17
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
18
AI Text To Diagram Generator
AI Text To Diagram Generator
AI Text To Diagram Generator
Create Mindmaps, & Flowcharts
Free
📊 Productivity
(0)
19
DiagramQuiz
DiagramQuiz
DiagramQuiz
Turn any diagram into a quiz
Free

Transform any diagram into an interactive study tool. Import or photograph images, then instantly remove labels to create blank versions for self-testing or classroom use. Supports multiple study modes for effective learning.

Import diagrams from photosGenerate blank diagrams by hiding labelsPrintable unlabeled diagrams
📚 Education
(1)
free with in-app purchases
20
DrawViewer
DrawViewer
DrawViewer
by Florian Schwaikl
Free
📊 Productivity
(0)

FAQ about Diagramas

What are the best diagramas apps for iPhone?
Carmin tops our diagramas apps ranking as of July 2026, with a 4.3-star average from 223 App Store ratings, and it's free to download.
Yes — 17 of the top diagramas apps we rank are free to download, including Carmin and Autowire - Car Wiring Diagrams.
Carmin shows ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 250+ diagramas apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
This app provides a regularly updated library of automotive electrical wiring diagrams. It's designed to be used as a reference for car repairs or for educational purposes, offering access to videos and technical documents.
Key features include access to trustful electrical wiring diagrams that are updated regularly. It also offers a library of videos and technical documents for research and reference, all accessible with a few clicks.

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