# Ohms Law vs Resistor Calc+

The clearest difference is rating: Resistor Calc+ at 5.0 against Ohms Law's 4.3. Resistor Calc+ also leads on update cadence (every 2 months vs every 16 months). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Resistor Calc+ holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 7 and 5 respectively. Written reviews complicate that: 70% of Ohms Law's written reviews are positive against 67% of Resistor Calc+'s, so the app with the better star average is not the one people write more warmly about.

Ohms Law ships an update every 16 months, Resistor Calc+ every 2 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Ohms Law | Resistor Calc+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (7 ratings)](https://appshunter.io/ios/app/ohms-law/id590727537/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/resistor-calc-plus/id1441211200/reviews)** |
| Number of ratings | **7** | 5 |
| Positive reviews | **70.0% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 16 months | **Every 2 months** |
| Monetization | Ad-supported | Ad-supported |
| Size | 12 MB | 6 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pro Certs Software Ltd](https://appshunter.io/developer/444429696) | [EONSOFT](https://appshunter.io/developer/899851112) |

## What reviewers say

### Ohms Law

[App page](https://appshunter.io/ios/app/ohms-law/id590727537)

This utility app calculates voltage, current, resistance, and power using Ohm's Law. Simply input any two values, and the app will compute the remaining two, providing a comprehensive tool for electrical calculations.

**Highlights:** Calculate Voltage, Calculate Current, Calculate Resistance, Calculate Power, Input two values to find others

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

**In-app purchases:** none


### Resistor Calc+

[App page](https://appshunter.io/ios/app/resistor-calc-plus/id1441211200)

This utility helps you determine the resistance value of resistors by interpreting their colored bands. It supports 3, 4, 5, and 6 band resistors, visually displaying your selections and the calculated resistance and tolerance.

**Highlights:** Calculates resistance for 3-6 band resistors, Visual band color selection, Displays resistance and tolerance, Aids electronics configuration, User-friendly interface

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Ohms Law free?

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

### Is Resistor Calc+ free?

Resistor Calc+ is free to download, with no in-app purchases.

### Which has better reviews, Ohms Law or Resistor Calc+?

Resistor Calc+ is rated higher. Ohms Law averages 4.3 out of 5 from 7 ratings, while Resistor Calc+ averages 5.0 from 5 ratings.

### Do Ohms Law or Resistor Calc+ have ads?

Both Ohms Law and Resistor Calc+ show ads.

### Which is updated more often, Ohms Law or Resistor Calc+?

Ohms Law ships an update every 16 months, and Resistor Calc+ every 2 months. Most recently, Ohms Law was updated on October 23, 2026 and Resistor Calc+ 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.*