Electrician Calc & Reference
Offline NEC & Wiring Guide
Only for iPhone
$4.99 · Designed for iPhone. Not verified for macOS.
iPhone
Professional offline electrical reference for working electricians. 14 calculators, 18 wiring diagrams, 12 installation guides. One payment — no subscription.
Built for electricians, electrical engineers, and contractors who need accurate answers fast — on-site, in the field, without internet access.
— WHY PROFESSIONALS PAY FOR THIS
Most electrical apps are free because they show ads or chase subscriptions. This app works completely offline. You pay once and own it. No monthly fees. No internet required on the job. No ads interrupting a calculation mid-install.
— CALCULATORS (14)
Solve real electrical problems before you touch a wire:
• Ohm's Law — DC and AC modes
• Motor Full Load Current
• Voltage Drop & Power Loss in Cable
• Conductor Resistance & Conductor Size
• Voltage Divider · Battery Life
• Series & Parallel Resistor
• Series & Parallel Capacitor
Most calculators include 2–4 input modes. Results in seconds.
— WIRING DIAGRAMS (18)
Professional-grade wiring diagrams for residential and industrial work:
• Home Wiring · Distribution Board · Electricity Meter
• DOL Starter · Forward/Reverse Motor Control
• ATS (Automatic Transfer Switch) · Generator Connection
• GFCI Outlet · Dimmer Switch · Ceiling Fan
• One-Way · Two-Way · Three-Way Switch
• Socket Wiring · Socket + Switch Combo
• Earth Leakage Relay · Phase Failure Relay
— INSTALLATION GUIDES (12)
Step-by-step guides for jobs electricians actually do:
• Residential & Commercial wiring
• Circuit Breaker · Light Switch · Ceiling Fan
• Air Conditioning · Solar Panel · EV Charger
• Generator · Security System · Smart Home
— ELECTRICAL THEORY (10 chapters)
Reference-grade theory when you need to verify the fundamentals:
• Ohm's Law · Power · Resistance · Capacitance · Inductance
• AC Circuits · Transformers · Motor · Energy & Cost · Voltage Drop
— UNIT CONVERTERS (14 categories)
• Current · Voltage · Resistance · Power · Energy
• Length · Temperature · Pressure · Angle · more
— REFERENCE TABLES (9)
• ANSI · Cable Reactance · Capacitor Color Code
• IEC 60320 · Standard Resistor · Thermocouple
• UL Fuse Class · Pipe Dimension
— FORMULAE LIBRARY
10 categories of working electrical formulas, offline.
— SAFETY GUIDE & GLOSSARY
Essential electrical safety reference. Searchable term dictionary.
— QUIZ MODE
Test and reinforce your knowledge. 50:50 lifeline, daily streaks.
One payment. Works offline. No subscription. No ads.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Mohamed Haizoun, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Mohamed Haizoun
- Size
- 42.9 MB
- Category
- Reference
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 Mohamed Haizoun
