---
title: "NEC Mastery - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "Developed with insights from licensed electricians and instructors nationwide, NEC Mastery has helped thousands pass their certification exams. Built around the 2023 NEC Code with 2024 updates.  Prepa"
---

# NEC Mastery — United States
> 8000+ Questions & Explanations

![NEC Mastery App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/26/dc/06/26dc066e-4915-73d2-6d43-e924ecbb0218/AppIcon-0-0-1x_U007emarketing-0-11-0-85-220.png/400x400bb.png)

**Developer:** [Webrich Software](https://apptail.io/developer/webrich-software-F) (India)
**Category:** Education
**Rating:** 4.8/5 (165 ratings)
**Price:** Free
**Bundle ID:** com.webrich.necexamprep
**Store:** Apple App Store
**Country:** United States
**Version:** 54 (released 2026-09-30)
**Original Release:** 2024-10-02

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6720711044)
**AppTail Page:** [https://apptail.io/app/nec-mastery-Xhku/united-states](https://apptail.io/app/nec-mastery-Xhku/united-states)

## NEC Mastery Description
Developed with insights from licensed electricians and instructors nationwide, NEC Mastery has helped thousands pass their certification exams. Built around the 2023 NEC Code with 2024 updates.

Prepare for your NEC Certification Exam with the most comprehensive study tool designed for Journeyman, Master Electricians, Electrical Contractors, Maintenance and Sign Electricians, Inspectors, and Examiners.

NOW IN ENGLISH AND SPANISH
Every question, calculator, reference table and help article is available in both languages. Terminology follows NFPA 70, Código Eléctrico Nacional — the official Spanish edition of the NEC — so what you study matches the exam you sit. Texas TDLR offers Spanish-language electrician exams through PSI against the 2023 NEC, which is exactly the edition this app is written to. Pick your language on first launch or change it any time in Settings; the whole app switches instantly, read-aloud voice included.

Quick Reference
Your pocket electrician's reference with 13 categories and 100+ items — all offline:
• Electrical Formulas (Ohm's Law, AC/DC power, impedance, power factor)
• Ampacity Tables (NEC 310.16, temperature derating, conduit fill adjustment)
• Wire Properties & Insulation Types
• Conduit Fill (EMT, RMC, PVC) & Conduit Bending
• Box Fill Calculations
• Voltage Drop Tables & Max Distance Lookups
• NEMA Plug/Receptacle Configurations
• Motor FLC Tables & Branch Circuit Sizing
• Grounding (EGC & GEC Sizing, Electrode Types)
• Transformer Formulas & OCPD Sizing
• Electrical Symbols & Unit Conversions
Bookmark any reference, search by NEC article number or keyword, and jump directly to related calculators.

20 NEC Calculators
Professional-grade calculators with NEC code references:
Ohm's Law, Power Converter, Wire Size, Ampacity Derating, Voltage Drop, Conduit Fill, Box Fill, Breaker Sizing, EGC Size, GEC Size, Motor Circuit, Motor Feeder, Lighting Load, EV Charger Load, Residential Load, Commercial Load, Transformer OCPD, Transformer Conductor, Cover Depth, and Fault Current.

Electrician Hour Log
Track your apprentice or journeyman work hours:
• 12 work categories and 4 sector types
• Dashboard with charts and goal tracking
• PDF export for state board submissions
• iCloud sync across all your devices

Books & Tools
Curated recommendations from working electricians — code books, test instruments, hand tools, and study guides.

Exams Covered
- Master & Journeyman Electrician: F16, F17, G17, T17
- Residential Electrician: F18, G18, T18
- Maintenance & Sign Electricians: F19, F21, F22, F23
- Electrical Contractor: F49
- Inspectors & Examiners: E1, E2, E3

Why Choose NEC Mastery
- 8,000+ exam-style questions with answers, NEC references, and detailed explanations
- Fully bilingual — English and Spanish, switchable at any time
- 20 professional NEC calculators for on-the-job use
- Quick Reference with 100+ items — ampacity, formulas, NEMA configs, and more
- Electrician hour log with iCloud sync and PDF export
- Covers the 2023 NEC Code with 2024 updates
- Choose your own syllabus — customize down to each individual article
- Mock tests and performance tracking to simulate real exams
- Instant feedback mode with explanations as you practice
- Dark mode and adjustable text size

Study by Chapter
1 General · 2 Wiring and Protection · 3 Wiring Methods and Materials · 4 Equipment for General Use · 5 Special Occupancies · 6 Special Equipment · 7 Special Conditions · 8 Communications Systems

Who Is This App For?
Apprentices and licensed electricians, residential/commercial/industrial electricians, contractors, inspectors, safety managers, engineers, and field technicians.

Privacy Policy: 
EULA: 

Join thousands of electricians who have passed their NEC exams with NEC Mastery.

## NEC Mastery Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/05/92/db/0592dbac-a832-5ed7-12d7-5d3315d638e8/01_marketing.png/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/0e/82/f2/0e82f23e-8b3c-1e4d-7cae-04eba5959395/02_marketing.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/43/66/29/436629d1-1f9c-4062-e850-c161fc1a42a3/03_marketing.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/57/31/93/573193bd-2c24-58af-bdcc-a274015eb985/07_marketing.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/9f/b8/75/9fb8757f-dbf8-30c1-fde4-8d33c14d7247/06_marketing.png/1284x2778.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/6b/eb/ce/6bebce83-c37b-7972-0a0d-7b2e7c6918a0/08_marketing.png/1284x2778.png)
- [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/ae/75/38/ae7538c5-a333-af8c-5c6d-694b2501c50c/04_marketing.png/1284x2778.png)
- [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/5e/db/f7/5edbf787-6cb6-5a29-bbeb-21b9bdcc0d70/05_marketing.png/1284x2778.png)

## NEC Mastery Rating Breakdown in United States
- 5 stars: 148 (90%)
- 4 stars: 10 (6%)
- 3 stars: 4 (2%)
- 2 stars: 0 (0%)
- 1 stars: 3 (2%)

## NEC Mastery Reviews in United States

### ***-- "Its better than nothing"
Would give 4 stars but as someone already pointed out if you pay attention the biggest answer is always the correct answer.  Just pick the longest answer and you will get it right every time.  You can still use this app to associate questions with the chapters in the nec code book which is useful
-- Palefacewb, 2025-09-18

### ***-- "Very good questions and info, but"
The answers to the questions are almost always the longest of the multiple choice answers.
-- mr they made me gove 5 stars, 2025-03-05

### ***** "User-Friendly and Cọmprehensive"
NEC Electrician Exam Prep Pro simplifies the studying process with its user-friendly layout and cọmprehensive content. I love the flashcards feature, which is great for quick revision. The app is clearly designed with students in mind, making it easier to absorb essential information. I’m feeling much more confident about my upcọming exam!
-- daniela_carrierq, 2025-02-20

### ***** "Well made NEC app"
This app has been very well made and I enjoy using it, however within just a few uses I’ve figured out the majority of the time the correct answer is the longest option within A,B,C or D so I would recommend finding ways to make it a bit more difficult as I can easily get the answers correct to things I do not know without looking them up so to the correct answer being obvious
-- Lewis391, 2024-12-15

### ***** "Huge help for my study"
Am at a stage where I am reading NEC code book and other reference books page by page. Downloaded quite a few apps and one of them is this. I found this to be the best as its extensive and easy to use.
-- iPhoneCrazy123, 2024-10-21

### ***** "Extensive and clean"
Plenty to practice in a clean app. No nonsense app. To the point without confusing features like other apps.
-- JimMolh, 2024-10-16

[View all NEC Mastery reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)



## NEC Mastery Discovered Keywords
- nec ampacity
- nec mastery


## NEC Mastery Available In
- [United States](https://apptail.io/app/nec-mastery-Xhku/united-states)
- [India](https://apptail.io/app/nec-mastery-Xhku/india)
- [Canada](https://apptail.io/app/nec-mastery-Xhku/canada)

---

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