# NEC Mastery vs Study Pass Build

The clearest difference is in-app purchases: Study Pass Build at none against NEC Mastery's 4. NEC Mastery's advantage is update cadence (every 10 days vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. NEC Mastery sells 4 in-app purchases, starting at $9.99 per month. Study Pass Build asks for nothing beyond the download.

NEC Mastery ships an update every 10 days, Study Pass Build every 6 weeks. Both last shipped on September 21, 2026.

## The numbers

| Metric | NEC Mastery | Study Pass Build |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (164 ratings)](https://appshunter.io/ios/app/nec-mastery/id6720711044/reviews)** | — |
| Number of ratings | **164** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 127 MB | 31 MB |
| Requires iOS | 16 | **15.1** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Webrich Software Limited](https://appshunter.io/developer/290203591) | [WorkFlow](https://appshunter.io/developer/1286854896) |

## 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 |


### Study Pass Build

[App page](https://appshunter.io/ios/app/study-pass-build/id6764489608)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is NEC Mastery free?

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

### Is Study Pass Build free?

Study Pass Build is free to download, with no in-app purchases.

### Do NEC Mastery or Study Pass Build have ads?

Neither NEC Mastery nor Study Pass Build shows ads.

### Which is updated more often, NEC Mastery or Study Pass Build?

NEC Mastery ships an update every 10 days, and Study Pass Build every 6 weeks. Most recently, NEC Mastery was updated on September 21, 2026 and Study Pass Build on September 21, 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.*