Best Technical Diagrams Apps

189+ iOS apps curated and reviewed

4.0 avg rating
16 free apps
Updated June 2026

Finding the right technical diagrams app can be overwhelming with so many options. We've analyzed 189+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Top Picks for Technical Diagrams

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
Flowdia Diagrams#3

Flowdia Diagrams by Behzad Gorimar

Flowchart & Diagramming
Worth Considering
📊 Productivity
3.5(65 ratings)
FreeIn-App Purchases
Flowdia Diagrams screenshot 1
Flowdia Diagrams screenshot 2
Flowdia Diagrams screenshot 3
Flowdia Diagrams screenshot 4

Create professional flowcharts and diagrams quickly and easily with our intuitive application. Streamline your workflow and communicate ideas effectively. Download now and start visualizing your concepts with ease!

More Technical Diagrams apps to explore

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

Create professional-looking diagrams and graphics with an all-in-one designer, featuring a rich set of themes, styles, and tools for flow charts, floor plans, network layouts, and more. Easily create, customize, and export your diagrams, and share them in various formats, including PDF, PNG, and Microsoft Visio.

💼 Business
(8)
5
Boeing 737 NG Diagrams
Boeing 737 NG Diagrams
Boeing 737 NG Diagrams
Interactive Training Diagrams
$19.99

This interactive training tool allows users to study and review the systems of a specific aircraft, manipulating components to see how they react and simulating emergencies to test their knowledge. With interactive diagrams and a cockpit poster, users can explore various systems, including electrical, fuel, and hydraulic, and even access additional cockpit companion resources.

📚 Education
(273)
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
MarkChart - Mermaid Editor
MarkChart - Mermaid Editor
MarkChart - Mermaid Editor
Markdown diagrams
Free

MarkChart is a Markdown-based application designed to preview and export Mermaid diagrams. It offers a seamless and efficient way to visualize your diagrams without the need for complex tools, with the added benefits of syntax highlighting, export options, and optimized iOS/iPadOS support, including Dark Mode. The application also provides a MarkChart Pro version as an optional one-time purchase to support its ongoing development.

🛠️ Developer Tools
(11)
8
Electrical Wiring Simulator
Electrical Wiring Simulator
Electrical Wiring Simulator
Practice Anytime, Anywhere
Free
$19.99 | 100% OFF

Practice electrical circuits with step-by-step simulations, mastering real-world wiring skills anytime, anywhere, without the risk. Learn and simulate basic house wiring, load control, and troubleshooting techniques, and take your skills to the next level with hands-on learning.

📚 Education
(7)
9
Bar Diagrams by iMathics
Bar Diagrams by iMathics
Bar Diagrams by iMathics
by Alexandra Hamburg
Free

Create intuitive bar and line charts with a user-friendly tool, and easily modify and adapt them to find the best representation for your needs. Print your charts directly from your device with the optional print function, and take advantage of features like table editing, color customization, and navigation buttons.

💼 Business
(12)
10
SLD | Electrical diagrams
SLD | Electrical diagrams
SLD | Electrical diagrams
Draw schemes easily
$1.99

Create professional electrical diagrams quickly and easily with integrated IEC and ANSI standard symbols. Drag and drop symbols like circuit breakers, switches, motors, and more to customize your one-line diagrams with precision and ease. Start designing now!

📊 Productivity
(130)
11
Pie Diagrams by iMathics
Pie Diagrams by iMathics
Pie Diagrams by iMathics
by Alexandra Hamburg
Free

Create intuitive pie and meter charts with a user-friendly tool, and easily modify and adapt them to suit your needs. Print your charts directly from your device with the in-app print function, and enjoy features like table editing, customizable colors, and navigation buttons.

💼 Business
(36)
12
Car parts for BMW diagrams ETK
Car parts for BMW diagrams ETK
Car parts for BMW diagrams ETK
OEM Diagrams car parts for BMW
$2.99

This application provides a comprehensive catalog of original and non-original car parts for BMW, allowing users to search by VIN or car and body, and access detailed information about spare parts. With features like saving favorite cars, detailed illustrations, and dark mode, users can easily find and manage the parts they need, and get started by downloading the app now.

🔍 Reference
(0)
13
Technical Pocket Guide (STT)
Technical Pocket Guide (STT)
Technical Pocket Guide (STT)
by Schaeffler Technologies GmbH & Co. KG
Free
🔍 Reference
(1)
14
Manuals: Access Free Manuals
Manuals: Access Free Manuals
Manuals: Access Free Manuals
Universal Manual Finder
Free

Find and access web and manuals directly from your browser's new tab with this convenient extension. Simplify your search process and access information quickly with our Manuals app!

📊 Productivity
(8)
15
Navigraph Charts
Navigraph Charts
Navigraph Charts
by Navigraph KB
Free

Discover the ultimate flight simulation companion with access to Jeppesen charts, IFR coverage at 7,000+ airports, and modern navigation tools in one seamless platform with Navigraph Charts. With features like worldwide VFR charts, moving maps, and real-time weather updates, elevate your flight experience today.

🗺️ Navigation
(2.5K)
16
LDB - Technical Database
LDB - Technical Database
LDB - Technical Database
Losberger De Boer
Free
🔧 Utilities
(0)
17
DrawExpress Diagram Lite
DrawExpress Diagram Lite
DrawExpress Diagram Lite
by DrawExpress Inc
Free
📊 Productivity
(22)
18
IADS 5
IADS 5
IADS 5
Mobile IETM Viewer
Free
📚 Books
(8)
19
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)
20
AKS Technical Documentation
AKS Technical Documentation
AKS Technical Documentation
by ALU K�NIG STAHL GmbH
Free
🛍️ Shopping
(4)