# Electric Master vs Volter Electrical Diagrams

The clearest difference is in-app purchases: Volter Electrical Diagrams at none against Electric Master's 3. Volter Electrical Diagrams also leads on update cadence (every 2 days vs every 2 weeks) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Electric Master sells 3 in-app purchases, starting at $9.99 per month. Volter Electrical Diagrams asks for nothing beyond the download.

Electric Master ships an update every 2 weeks, Volter Electrical Diagrams every 2 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Electric Master | Volter Electrical Diagrams |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (5 ratings)](https://appshunter.io/ios/app/electric-master-nec-panel/id6760935722/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 72 MB | 8 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yusuf Can Samiloglu](https://appshunter.io/developer/1863275820) | [Asenko](https://appshunter.io/developer/6801025875) |

## What reviewers say

### Electric Master

[App page](https://appshunter.io/ios/app/electric-master-nec-panel/id6760935722)

This app provides a suite of electrical calculation tools for professionals, offering NEC-compliant solutions for wire sizing, voltage drop, and more. It works offline and allows for PDF export of results with custom branding.

**Highlights:** NEC-compliant electrical calculators, Offline functionality, Voltage drop calculations, Ampacity and wire sizing, PDF export with branding, Calculation history, Siri Shortcuts integration

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly — All Calculators | $9.99 | per month |
| Pro Yearly — All Calculators | $59.99 | per year |
| Pro Lifetime — All Calculators | $119.99 | one-time |


### Volter Electrical Diagrams

[App page](https://appshunter.io/ios/app/volter-electrical-diagrams/id6801025873)

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

**In-app purchases:** none


## Frequently asked questions

### Is Electric Master free?

Electric Master is free to download, with in-app purchases available.

### Is Volter Electrical Diagrams free?

Volter Electrical Diagrams is free to download, with no in-app purchases.

### Do Electric Master or Volter Electrical Diagrams have ads?

Neither Electric Master nor Volter Electrical Diagrams shows ads.

### Which is updated more often, Electric Master or Volter Electrical Diagrams?

Electric Master ships an update every 2 weeks, and Volter Electrical Diagrams every 2 days. Most recently, Electric Master was updated on October 24, 2026 and Volter Electrical Diagrams 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.*