# CalcEngineer vs Electric Master

The clearest difference is rating: CalcEngineer at 5.0 against Electric Master's 3.6. CalcEngineer also leads on in-app purchases (none vs 3) and update cadence (every 2 days vs every 2 weeks). On price, ratings volume, 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. CalcEngineer asks for nothing beyond the download.

CalcEngineer holds the better App Store score, 5.0 against 3.6. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

CalcEngineer ships an update every 2 days, Electric Master every 2 weeks. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | CalcEngineer | Electric Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calcengineer/id6748969344/reviews)** | [3.6 (5 ratings)](https://appshunter.io/ios/app/electric-master-nec-panel/id6760935722/reviews) |
| Number of ratings | 2 | **5** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 2 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 10 MB | 72 MB |
| Requires iOS | 17 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Justin Bush](https://appshunter.io/developer/1828308327) | [Yusuf Can Samiloglu](https://appshunter.io/developer/1863275820) |

## What reviewers say

### CalcEngineer

[App page](https://appshunter.io/ios/app/calcengineer/id6748969344)

This app provides professional engineering calculations for compressed air systems. It helps engineers and technicians determine CFM requirements, size compressors and tanks, and analyze pressure drops for optimized pneumatic systems.

**Highlights:** CFM Calculator, Compressor & Tank Sizing, Pressure Drop Analysis, Flow Velocity & Pipe Sizing, Multiple CFM Entries, General Engineering Calculator Suite

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is CalcEngineer free?

CalcEngineer is free to download, with no in-app purchases.

### Is Electric Master free?

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

### Which has better reviews, CalcEngineer or Electric Master?

CalcEngineer is rated higher. CalcEngineer averages 5.0 out of 5 from 2 ratings, while Electric Master averages 3.6 from 5 ratings.

### Do CalcEngineer or Electric Master have ads?

Neither CalcEngineer nor Electric Master shows ads.

### Which is updated more often, CalcEngineer or Electric Master?

CalcEngineer ships an update every 2 days, and Electric Master every 2 weeks. Most recently, CalcEngineer was updated on October 28, 2026 and Electric Master on October 24, 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.*