Comparison

NEC Electrical Exam by VoltLab vs NEC Prep

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

NEC Electrical Exam by VoltLab

Prepare for electrician licensing exams with AI-powered practice tests and personalized study plans. Track your progress, identify weak areas, and simulate real exam conditions to ensure you're ready to pass.

Highlights
  • AI-powered readiness score
  • Full mock exams
  • Customizable practice drills
  • Daily code challenges
  • AI-generated questions with explanations
  • Progress tracking and weak area identification
  • Timed practice mode
Features
Read full description

Pass your journeyman electrical exam with a plan, not guesswork. VoltageLab is NEC exam prep built for electricians. Pick your trade level, your state and your exam date, and the app builds a day-by-day study plan, weights your practice to the code sections your exam actually tests, and shows how close you are to ready. VERIFIED PRACTICE QUESTIONS Every question is written to the National Electrical Code and comes with a full explanation and the article it's based on, so you learn the code, not just the answer. TIMED MOCK EXAMS Sit full-length practice tests with a real clock, real question counts and a pass mark. Review every miss afterwards. READINESS SCORE See which parts of the code are costing you points and watch your score rise as you fix them. DRILLS FOR EVERY SKILL - Calc Drills: box fill, conduit fill, voltage drop, ampacity and load calculations - Table Match: find the right NEC table fast, against the clock - Code Compliant?: spot the violation in real-world installs - Code Reading: learn to navigate the codebook quickly - Custom practice by article or topic STUDY A LITTLE, EVERY DAY - One study unit a day on your personal learning path - Daily Code Challenge: a fresh question every day - Streaks and badges to keep you on track LEARN WITH YOUR CREW - 1v1 code battles against other electricians - Group quizzes for apprentices, classmates and shop crews - Weekly Code Cup leaderboard BUILT AROUND YOUR STATE EXAM Prepare for journeyman electrician, master electrician and electrical contractor licensing exams in 38 states, including Texas, Florida, Georgia, North Carolina, Ohio, Michigan, Washington and Colorado. Great for apprentices and trade school students too. Start free. Upgrade to Pro for full access to every question and drill. VoltageLab is an independent study tool and is not affiliated with NFPA, PSI, Pearson VUE, Prov or any state licensing board. National Electrical Code and NEC are registered trademarks of the NFPA. Terms of Use: https://quiz.voltagelab.com/play-store-terms-conditions Privacy Policy: https://quiz.voltagelab.com/play-store-privacy-policy

About

NEC Prep

This app guides users through electrical exam preparation with a structured study plan. It focuses on building code book lookup speed through lessons, practice rounds, and progress tracking, culminating in timed runs. The tool helps users learn efficient navigation and application of electrical code rules.

Highlights
  • Structured study path with visual course map
  • Book-first learning for code book navigation
  • Daily lookup questions and topic-focused practice
  • Progress tracking for lessons, streaks, and corrections
  • Local study settings saved on device
Features
Read full description

Build NEC lookup speed with a study plan that always shows the next move. NEC Prep turns electrical exam preparation into a structured path. Start by setting up your code book, move through focused lessons and practice rounds, and track your work as you progress toward a final timed run. THE STUDY PATH - Follow a visual course map from book setup through exam practice - See the purpose, sections, and progress for every lesson - Unlock the next stop as you complete the current work - Keep lessons, practice, review, and settings connected in one system BOOK-FIRST LEARNING - Build code book tab and navigation habits - Learn the route to the relevant article instead of relying on guesses - Practice finding, reading, and applying code rules - Reinforce each active lesson with focused rounds DAILY PRACTICE - Complete a quick daily lookup question - Choose focused practice by topic - Review the NEC route after each answer - Keep your test date and current work visible PROGRESS WITHOUT CLUTTER - See completed lessons and the next unlocked step - Track current streak, answered questions, and corrections - Review routes that need more work - Keep study settings saved locally on your device NEC Prep is built for electricians, apprentices, and electrical exam candidates who want direct practice and a clearer way through the book. NEC Prep is an independent study tool. It is not affiliated with, endorsed by, or sponsored by the National Fire Protection Association. NEC and National Electrical Code are registered trademarks of the National Fire Protection Association.

Screenshots

NEC Electrical Exam by VoltLab4 screens
NEC Prep4 screens

Verdict

The call

The clearest difference is in-app purchases: NEC Prep at none against NEC Electrical Exam by VoltLab's 2. NEC Prep also leads on ratings volume (4 vs 1). NEC Electrical Exam by VoltLab's advantage is ads (none vs shown) and iOS requirement (15.6 vs 17.0). On price, rating, review sentiment and update cadence there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. NEC Electrical Exam by VoltLab sells 2 in-app purchases, starting at $2.99 per month. NEC Prep asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for NEC Electrical Exam by VoltLab against 5.0 for NEC Prep. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

NEC Electrical Exam by VoltLab ships an update every 5 weeks, NEC Prep monthly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 5 level
NEC Electrical Exam by VoltLab versus NEC Prep: the parameters behind the verdict, then further details
ParameterNEC Electrical Exam by VoltLabNEC Prep
PriceFreeFree
Rating5.0 (1 ratings)5.0 (4 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings14 — better
Update frequencyEvery 5 weeksMonthly — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree — betterAd-supported
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size77 MB125 MB
Age rating4+4+
DeveloperNazmul IslamDYLAN MICHAEL MCBEAN

Customer experience

NEC Electrical Exam by VoltLab

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

NEC Prep

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

NEC Electrical Exam by VoltLab

Subscriptions2
  • US3 Days trial$2.991 Month
  • US3 Days trial$29.991 Year
None

NEC Prep

No in-app purchases

Questions

Is NEC Electrical Exam by VoltLab free?
NEC Electrical Exam by VoltLab is free to download, with in-app purchases available.
Is NEC Prep free?
NEC Prep is free to download, with no in-app purchases.
Which has better reviews, NEC Electrical Exam by VoltLab or NEC Prep?
NEC Electrical Exam by VoltLab and NEC Prep are both rated 5.0 out of 5 on the App Store, from 1 and 4 ratings respectively.
Do NEC Electrical Exam by VoltLab or NEC Prep have ads?
NEC Prep shows ads; NEC Electrical Exam by VoltLab does not.
Which is updated more often, NEC Electrical Exam by VoltLab or NEC Prep?
NEC Electrical Exam by VoltLab ships an update every 5 weeks, and NEC Prep monthly. Most recently, NEC Electrical Exam by VoltLab was updated on November 5, 2026 and NEC Prep on October 31, 2026.

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