# OHMs Law Calc — user reviews

> 8 indexed App Store user reviews of OHMs Law Calc by Caladan Software, rated 4.00/5 from 3 ratings.

- Source: https://appshunter.io/ios/app/ohms-law-calc/id497274523/reviews
- App overview in markdown: https://appshunter.io/ios/app/ohms-law-calc/id497274523.md
- Rating breakdown: 5★ 2 · 4★ 0 · 3★ 0 · 2★ 1 · 1★ 0

## Most critical reviews (8 lowest-rated)

### 1/5 — Sparky

*2012-09-01*

A  lot of better free apps out there!
Waste of money! Wish I can take my
Money back.

### 2/5 — Incorrectly calculates for AC

*2015-03-22*

Good attempt, but this calculator works 100% correctly ONLY for DC.  

For AC, it ignores Power Factor (PF), caused by ever present out-of-phase Reactive currents. All AC "Power" results are really in "Volt-Amps" (VA) not Watts.

For 3-Ph AC it incorrectly calculates  VA, when given Voltage & Current.  The correct method is: V x A x 1.73 (Sq Root of 3) = VA
 
Power in Watts is then: 
VA x PF = Watts 

PF is always a number between 0 & 1, with 1 being in-phase (purely resistive) current, and 0 being 90 deg out-of-phase (purely reactive) current. 

For calculations (where actual PF is unknown) a PF of 0.8 is typically used.

Resistance alone in never the only factor in AC Circuits.

### 5/5 — Quick and Easy!

*2015-03-28*

This app really does calculate Three Phase correctly... Not just using the old "lazy engineers" trick of multiplying by 1.732... But rather doing the actual VECTOR MATH to properly calculate BOTH balanced and unbalanced loads.  Works great for resistive AC circuits too!
The app does exactly what it says, makes single and three phase calculations a breeze.  I'll never get the wrong Three Phase Breaker again!

### 5/5 — Best ohms law app I have ever used!

*2012-04-24*

This is the best ohms law app I have in my electronics folder! I really like this app! Good job!A+

### 5/5 — awesome

*2012-03-03*

works just like described, it does 3phase and single phase.  It's also iphone and ipad compatible.  5 start app all the way

### 5/5 — Draftmen

*2012-02-28*

This is a very good calculator one of the best I have ever used . Very well done.

### 5/5 — Wow.

*2012-02-09*

3 Phase works!!! Finally an app with 3 phase that works. Great app, highly recommended. Very easy to use UI, saves a lot of time and mistakes. Helpful guide provided on website as well.  A must have.

### 5/5 — 3 Phase Values At Last!

*2012-01-31*

Great app. The only app that I've found that properly calculates 3 phase values.

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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 2026-08-24.*