Best Wiring Diagram Electrical Apps

195+ iOS apps curated and reviewed

4.7 avg rating
16 free apps
Updated May 2026

Carmin is the household name in wiring diagram electrical, but it's far from the only option. We track 195+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Wiring Diagram Electrical Apps (May 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1CarminCarminFree4.3★ (175)YesYesJul 2026
2Electrical Panel DesignerElectrical Panel DesignerFree was $6.995.0★ (4)NoYesJul 2026
3Electric Toolkit - CalculatorElectric Toolkit - Calculator$5.994.8★ (282)NoNoJul 2026
4Wire Color CodeWire Color CodeFree4.7★ (654)NoYesJul 2026
5Ugly's Electrical ReferencesUgly's Electrical References$12.994.4★ (1.5K)NoNoJul 2026
6Electrical Code-A-DayElectrical Code-A-DayFree4.8★ (8.6K)NoNoJul 2026
7Master Electrician Ref. LiteMaster Electrician Ref. LiteFree4.7★ (2.4K)NoNoJul 2026
8Electrical Wiring SimulatorElectrical Wiring SimulatorFree was $19.994.7★ (82)NoYesJul 2026

Top Picks for Wiring Diagram Electrical

Carmin#1

Carmin by Chuan Nguyen Van

Automotive Wiring Diagrams
Editor's Choice
🔍 Reference
4.3😐(175 ratings)
FreeAdsIn-App Purchases
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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)
Electrical Panel Designer#2

Electrical Panel Designer by Sergey Vavaev

Switchboard Wiring Diagram
Strong Contender
🎨 Graphics & Design
5.0(4 ratings)
FreeIn-App Purchases
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Electrical Panel Designer screenshot 6

Design and assemble electrical panels with a comprehensive tool for electricians, designers, and homeowners. Create detailed wiring diagrams, route wires, and manage projects locally on your device. Features include a vast library of components and customizable labeling for clear documentation.

Electric Toolkit - Calculator#3

Electric Toolkit - Calculator by Cyberprodigy LLC

Electrical Wiring Diagrams
Worth Considering
🔧 Utilities
4.8(282 ratings)
$5.99
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This app provides a comprehensive collection of electrical wiring diagrams and calculators for home projects. It includes various switch and fan wiring configurations, outlet diagrams, and essential calculators for grounding, circuit breakers, and voltage drop, adhering to NEC standards.

More Wiring Diagram Electrical apps to explore

4
Wire Color Code
Wire Color Code
Wire Color Code
Electrical circuit colors
Free

This app helps electricians and DIYers identify electrical wire colors globally. It offers country-specific codes, a large circuit database, and quick search functionality. Customize colors for your projects and enjoy a user-friendly interface for efficient electrical panel wiring.

Global country-specific wire color codesExtensive circuit database (up to 1000 circuits)Quick search for phase colors
📊 Productivity
(654)
free with in-app purchases
5
Ugly's Electrical References
Ugly's Electrical References
Ugly's Electrical References
by Informed Publishing
$12.99

This app provides electricians and electrical professionals with up-to-date digital information based on the National Electrical Code. It includes formulas, wiring diagrams, conduit bending guides, and calculators for various electrical calculations. The app is designed for on-the-job reference and works offline.

NEC 2026 updatesMathematical formulas and calculatorsConduit bending guide with videos
📊 Productivity
(1.5K)
paid
6
Electrical Code-A-Day
Electrical Code-A-Day
Electrical Code-A-Day
Quiz for Electricians
Free

Test your electrical knowledge daily with a new question based on the US electrical code. Perfect for apprentices, journeymen, and masters seeking to learn or refresh their understanding of electrical concepts and regulations.

Daily electrical code questionsQuestions written by a real electricianCovers a wide range of electrical topics
📊 Productivity
(8.6K)
free
7
Master Electrician Ref. Lite
Master Electrician Ref. Lite
Master Electrician Ref. Lite
A handbook for electricians
Free

This electronic pocket reference guide provides essential information for electrical professionals. It offers calculations, code tables, and detailed sections on motors, ampacities, grounding, and more, all accessible on your mobile device.

Motor and wiring informationAmpacity tablesConduit fill and grounding sizes
📊 Productivity
(2.4K)
paid
8
Electrical Wiring Simulator
Electrical Wiring Simulator
Electrical Wiring Simulator
Practice Anytime, Anywhere
Free
$19.99 | 100% OFF

Practice real-world electrical wiring skills with interactive, step-by-step simulations. Learn load control, parallel/series wiring, and troubleshooting without tools or risk. Ideal for students and aspiring electricians.

Step-by-step simulationsReal-world wiring practiceLoad control and switching
📚 Education
(82)
paid
9
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
10
Ask BONBON - NEC Code AI
Ask BONBON - NEC Code AI
Ask BONBON - NEC Code AI
Electrical & NEC AI Assistant
Free
$14.99 | 100% OFF

This AI-powered assistant provides instant answers to National Electrical Code (NEC) questions for electricians. Get precise code information, explanations, and troubleshooting help directly on the job site to ensure compliance and build confidence.

Instant NEC code answersAI-powered code explanationsSmart job site troubleshooting
📊 Productivity
(36)
free
11
Electrical & Electrician App
Electrical & Electrician App
Electrical & Electrician App
Quizzes, Flashcards and Videos
Free

This app is a comprehensive learning tool for electricians, technicians, and students. It offers interactive lessons, quizzes, flashcards, and visual guides to master electrical concepts, wiring, and troubleshooting. Features include AI-powered study assistance and offline access for continuous learning.

AI Study CoachElectrical QuizzesElectrical Wiring Lessons
📚 Education
(6)
freemium
12
Southwire® Voltage Drop Calc
Southwire® Voltage Drop Calc
Southwire® Voltage Drop Calc
Southwire Calculator
Free

Calculate the appropriate wire size for electrical circuits. This tool helps determine wire size based on voltage drop and current carrying capacity, ensuring compliance with NEC ampacity limits.

Determine wire size for voltage dropCalculate voltage drop for conductor runsLimit wire size by voltage drop
🔧 Utilities
(1.5K)
free
13
Mike Holt's Electrical Toolbox
Mike Holt's Electrical Toolbox
Mike Holt's Electrical Toolbox
Electrical Power Calculator
Free

This app provides essential calculations for electricians, inspectors, contractors, and engineers. It helps determine conductor sizing, circuit protection, race sizing, and grounding conductor sizes for various electrical equipment and services.

Conductor sizingVoltage drop limitationsCircuit protection sizing
🔧 Utilities
(197)
free
14
2017 Master Electrician Ref.
2017 Master Electrician Ref.
2017 Master Electrician Ref.
A handbook for electricians
$9.99

This digital handbook provides electricians and related professionals with essential electrical formulas, diagrams, and reference tables. It offers calculations, a dictionary of terms, and detailed information on wiring, motors, transformers, and more, all accessible on a mobile device.

Electrical formulas and calculationsWiring diagrams for various systemsMotor and transformer specifications
📊 Productivity
(1.2K)
paid
15
Electrical Calculations
Electrical Calculations
Electrical Calculations
by Egal Net di Ettore Gallina
Free

This app provides a comprehensive suite of electrical calculations for professionals. It supports various international standards and offers detailed reports in PDF format. The tool covers wiring, power, motor, and electronic calculations, along with extensive conversion tables and resources.

Wire size and voltage drop calculationsPower, current, and resistance calculationsMotor performance and connection diagrams
📊 Productivity
(125)
free with in-app purchases
16
SLD | Electrical diagrams
SLD | Electrical diagrams
SLD | Electrical diagrams
Draw schemes easily
$1.99

Easily create single-line electrical diagrams with a vast library of IEC and ANSI standard symbols. Drag and drop components to build your schemes, with options to save and edit in the PRO version.

Create single-line diagramsDrag and drop symbol placementIEC and ANSI standard symbols
📊 Productivity
(130)
free with in-app purchases
17
Wiring Harnesser
Wiring Harnesser
Wiring Harnesser
Wiring Reference & Documenter
Free

This app helps technicians document and reference electrical wiring for projects. It allows users to input connections, view connector details, and navigate through diagrams. Users can also upload images and convert wire gauges.

Input Groups, Connectors, and NetsView connector pin detailsNavigate between associated detail pages
📊 Productivity
(3)
free
18
Simubus
Simubus
Simubus
Electrical Wiring Simulator
Free
🔧 Utilities
(0)
19
NEC Electrical Exam by Dakota
NEC Electrical Exam by Dakota
NEC Electrical Exam by Dakota
NEC Practice Test Questions
Free

Prepare for your electrical licensing exams with a vast library of practice questions, detailed explanations, and AI-powered assistance. Track your progress and identify weak areas to study more effectively for Journeyman, Master Electrician, and Contractor exams.

Over 3000 exam questionsAI tutor for step-by-step helpPractice specific exam topics
📚 Education
(400)
free with in-app purchases
20
Electrical Formulator
Electrical Formulator
Electrical Formulator
by Historycentral.com Inc
Free

This app provides a comprehensive suite of electrical calculation tools for design and engineering challenges. It offers hundreds of conversion and calculation options, with features to save, print, and email results. Easily access frequently used and recently accessed formulas, with all calculations automatically stored.

Over 100 electrical formulasSave and organize resultsShare results via email or print
📊 Productivity
(1)
freemium

FAQ about Wiring Diagram Electrical

What are the best wiring diagram electrical apps for iPhone?
Carmin tops our wiring diagram electrical apps ranking as of May 2026, with a 4.3-star average from 175 App Store ratings, and it's free to download.
Yes — 16 of the top wiring diagram electrical apps we rank are free to download, including Carmin and Electrical Panel Designer.
Carmin shows ads and offers in-app purchases, according to its App Store listing as of May 2026.
We track 195+ wiring diagram electrical apps on the iOS App Store as of May 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.