# Phase Calc — Electrical Mastery

> Advanced electrical engineering app for three-phase power system analysis. (iPhone/iPad app by Donnie Herman.)

- Source: https://appshunter.io/ios/app/phase-calc/id837266300 (this page in markdown: same URL + `.md`)
- Developer: [Donnie Herman](https://appshunter.io/developer/837266303)
- Category: Utilities, Education
- Price: $1.99
- Rating: 5.00/5 from 4 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 13 MB
- Languages: American English
- Released: 2014-05-24
- Data updated: 2026-08-01
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/phase-calc/id837266300/reviews.md

## What is Phase Calc?

Phase Calc for iOS is an advanced engineering app for most electrical designs, expecially symmetrical component analysis and three-phase power system calculations. Built for students, teachers, technicians, and engineers, it combines a polished mobile experience with a powerful technical workflow for fast, accurate analysis of unbalanced three-phase systems in the field, lab, or classroom.

The app performs both phase-to-sequence and sequence-to-phase transformations, with support for inputs in polar and rectangular form. It quickly resolves three unbalanced phase quantities into their positive-, negative-, and zero-sequence components, making it a practical tool for protection studies, fault analysis, system modeling, relay validation, and coursework.

More than a single-purpose calculator, Phase Calc is packed with specialized calculators, technical reference libraries, and built-in formulas to support everyday power systems work. Whether you are checking values, reviewing theory, or working through engineering problems more efficiently, the app puts essential tools in one place.

Results can be exported instantly, including vector data for plotting and graphical analysis, as well as technical report exports for documentation, review, and sharing. With powerful capabilities in a streamlined interface, Phase Calc delivers a complete mobile toolkit for three-phase analysis on iPhone and iPad.

## Key features

- Symmetrical component analysis
- Three-phase power system calculations
- Phase-to-sequence and sequence-to-phase transformations
- Polar and rectangular input support
- Specialized calculators and reference libraries
- Exportable results for documentation

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/phase-calc/id837266300/reviews.md

### 5/5 — Love it

*2017-06-29*

I test transmission line relays and this app really helps me to quickly calculate my zero sequence values when testing a ground fault relay.

**Developer response:** Thank you for your review. It is appreciated. We read each review and take them seriously. Please contact me within the app if you have any concerns or comments. Thanks again.

### 5/5 — Great App

*2014-05-26*

A great tool for anyone doing 3 phase and for the electrical student learning as well!!! Great job!!!!!! Can't wait to see what's next!!!

**Developer response:** Thank you for your review. It is appreciated. We read each review and take them seriously. Please contact me within the app if you have any concerns or comments. Thanks again.

### 5/5 — Glad I found this app

*2014-05-25*

Works great! Thank you !

**Developer response:** Thank you for your review. It is appreciated. We read each review and take them seriously. Please contact me within the app if you have any concerns or comments. Thanks again.

### 5/5 — Thank you

*2014-05-24*

Perfect tool for the job

**Developer response:** Thank you for your review. It is appreciated. We read each review and take them seriously. Please contact me within the app if you have any concerns or comments. Thanks again.

### 5/5 — I like it!!

*2014-05-24*

Works great! Easy to use!

**Developer response:** Thank you for your review. It is appreciated. We read each review and take them seriously. Please contact me within the app if you have any concerns or comments. Thanks again.

## Frequently asked questions about Phase Calc

### What is Phase Calc used for?

Phase Calc is an advanced engineering app designed for electrical designs, particularly symmetrical component analysis and three-phase power system calculations. It helps users analyze unbalanced three-phase systems, perform sequence transformations, and access technical reference libraries.

### Who is Phase Calc designed for?

This app is built for students, teachers, technicians, and engineers who work with electrical systems. It provides a powerful technical workflow for fast and accurate analysis in the field, lab, or classroom.

### What types of electrical calculations does Phase Calc perform?

Phase Calc performs both phase-to-sequence and sequence-to-phase transformations, resolving unbalanced phase quantities into their positive-, negative-, and zero-sequence components. It's useful for protection studies, fault analysis, and system modeling.

### Can I export results from Phase Calc?

Yes, results from Phase Calc can be exported instantly. This includes vector data for plotting and graphical analysis, as well as technical report exports for documentation, review, and sharing.

### What devices does Phase Calc support?

Phase Calc is available for iPhone and iPad, offering a complete mobile toolkit for three-phase analysis on Apple devices.

### How much does Phase Calc cost?

Phase Calc is a paid application, priced at $1.99. It offers a one-time purchase for access to all its features.

### How often is Phase Calc updated?

The latest version of Phase Calc is 2.0.0, last updated on March 12, 2026. This indicates a commitment to ongoing development and improvements.

### Does Phase Calc have ads?

No, Phase Calc does not contain advertisements. It provides an ad-free experience for users.

## Version history (last 5 releases)

### 2.0.0 — 2026-03-12

This version is a completely new app design bringing new features far beyond simple electrical calculations. Please enjoy, and send any feedback within the app.

### 1.2.4 — 2018-02-23

This app has been updated by Apple to display the Apple Watch app icon.

Thank you for using Phase Calc! Please contact developer inside the app to request features and report issues

- Newer higher resolution icons
- A feature now prevents exporting data if values are zero
- User interface scales better for iPad
- Minor UI improvements 

Phase Calc is now a universal iOS app! Works with iPhone, iPad and iPod Touch

### 1.2.3 — 2018-02-22

Thank you for using Phase Calc! Please contact developer inside the app to request features and report issues

- Improved the way significant digit values are displayed 
- Minor UI improvements for various screen size compatibility, including the iPhone X
- Phase Calc is now a universal iOS app! Works with iPhone, iPad and iPod Touch

### 1.2.2 — 2018-02-20

Thank you for using Phase Calc! Please contact developer inside the app to request features and report issues. 

- Fixed App Store rating button
- Added Wolfram copy link feature
- Minor UI improvements
- Phase Calc is now a universal iOS app! Works with iPhone, iPad and iPod Touch

### 1.2.1 — 2018-02-18

Thank you for using Phase Calc! Please contact developer inside the app to request features and report issues. 

- Fixed a bug with exporting data to WolframAlpha
- Minor UI improvements
- Phase Calc is now a universal iOS app! Works with iPhone, iPad and iPod Touch.

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## More apps by Donnie Herman

- [Complex Vector Calc](https://appshunter.io/ios/app/complex-vector-calc/id1351794231)
- [RICASHAY](https://appshunter.io/ios/app/ricashay/id6759670719)
- [RICASHAY-LITE](https://appshunter.io/ios/app/ricashay-lite/id6759920665)
- [Phase Calc-Lite](https://appshunter.io/ios/app/phase-calc-lite/id6760266074)
- [Complex Vector Calc-LITE](https://appshunter.io/ios/app/complex-vector-calc-lite/id6760274300)

All apps by Donnie Herman: https://appshunter.io/developer/837266303

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-01.*