# NEC Mastery vs NEC Electrical Exam by VoltLab

The clearest difference is monetization model: NEC Electrical Exam by VoltLab at free against NEC Mastery's free with in-app purchases. NEC Electrical Exam by VoltLab also leads on review sentiment (100% vs 80%). NEC Mastery's advantage is ratings volume (172 vs 1) and update cadence (fortnightly vs every 5 weeks). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. NEC Mastery sells 4 in-app purchases, starting at $9.99 per month and NEC Electrical Exam by VoltLab sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

NEC Electrical Exam by VoltLab holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: NEC Mastery has 172 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 80% of NEC Mastery's written reviews are positive against 100% of NEC Electrical Exam by VoltLab's.

NEC Mastery ships an update fortnightly, NEC Electrical Exam by VoltLab every 5 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | NEC Mastery | NEC Electrical Exam by VoltLab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (172 ratings)](https://appshunter.io/ios/app/nec-mastery/id6720711044/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nec-electrical-exam-by-voltlab/id6759293855/reviews)** |
| Number of ratings | **172** | 1 |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 127 MB | 77 MB |
| Requires iOS | 16 | **15.6** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Webrich Software Limited](https://appshunter.io/developer/290203591) | [Nazmul Islam](https://appshunter.io/developer/1860082590) |

## What reviewers say

### NEC Mastery

[App page](https://appshunter.io/ios/app/nec-mastery/id6720711044)

Prepare for electrician certification exams with over 8,000 practice questions and detailed explanations. Access a comprehensive quick reference guide and 20 professional NEC calculators for on-the-job use. Track work hours with a built-in log for state board submissions.

**Highlights:** 8000+ exam-style questions, 20 NEC calculators, Quick reference guide, Electrician hour log, 2023/2024 NEC Code updates, Customizable study syllabus, Mock tests and performance tracking

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Question Bank | $9.99 | per month |
| Full Question Bank | $24.99 | per 3 months |
| Full Question Bank | $39.99 | per 6 months |
| Full Question Bank | $59.99 | per year |


### NEC Electrical Exam by VoltLab

[App page](https://appshunter.io/ios/app/nec-electrical-exam-by-voltlab/id6759293855)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| US | $2.99 | per month |
| US | $29.99 | per year |


## Frequently asked questions

### Is NEC Mastery free?

NEC Mastery is free to download, with in-app purchases available.

### Is NEC Electrical Exam by VoltLab free?

NEC Electrical Exam by VoltLab is free to download, with in-app purchases available.

### Which has better reviews, NEC Mastery or NEC Electrical Exam by VoltLab?

NEC Electrical Exam by VoltLab is rated higher. NEC Mastery averages 4.8 out of 5 from 172 ratings, while NEC Electrical Exam by VoltLab averages 5.0 from 1 ratings.

### Do NEC Mastery or NEC Electrical Exam by VoltLab have ads?

Neither NEC Mastery nor NEC Electrical Exam by VoltLab shows ads.

### Which is updated more often, NEC Mastery or NEC Electrical Exam by VoltLab?

NEC Mastery ships an update fortnightly, and NEC Electrical Exam by VoltLab every 5 weeks. Most recently, NEC Mastery was updated on October 30, 2026 and NEC Electrical Exam by VoltLab on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*