# Ohms Law Calc. vs Device Configuration

The clearest difference is in-app purchases: Device Configuration at none against Ohms Law Calc.'s 1. Device Configuration also leads on ads (none vs shown) and iOS requirement (11.0 vs 17.6). On price, update cadence and device support there is nothing between them.

Both are free to download. Ohms Law Calc. sells 1 one-off in-app purchase. Device Configuration asks for nothing beyond the download.

Ohms Law Calc. ships an update every 2 months, Device Configuration every 3 months. The most recent releases landed on September 8, 2026 and December 22, 2025 respectively.

## The numbers

| Metric | Ohms Law Calc. | Device Configuration |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.3K ratings)](https://appshunter.io/ios/app/ohms-law-calc/id491898006/reviews)** | — |
| Number of ratings | **1.3K** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 20 MB |
| Requires iOS | 17.6 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Audio Enhancement](https://appshunter.io/developer/1613167106) |

## What reviewers say

### Ohms Law Calc.

[App page](https://appshunter.io/ios/app/ohms-law-calc/id491898006)

This app provides a comprehensive suite of electrical calculations, including Ohm's Law, voltage drop, wire sizing, and impedance. It also offers numerous converters for various electrical units and parameters, aiding in circuit design and analysis.

**Highlights:** Ohm's Law calculations, Voltage drop calculator, Wire size calculator, Impedance calculations (R, L, C), Electrical unit converters, Power and current conversions, Circuit design tools

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ohms Law Calc. | $3.99 | one-time |

**What reviewers like**

- 🚀 Great value
- 🚀 Works perfectly
- 🚀 Fantastic app
- 👍 Best thing since sliced bread
- 🚀 Useful for electrical work

**What reviewers complain about**

- 👎 Have to pay again for an app already purchased
- 👎 Not easy to use
- 🐛 Paid but not unlocked, no response from developer
- 👎 Annoying pop-ups
- 🐛 Keeps shutting down

**Reported bugs**

- Paid version not unlocking
- Repeatedly prompting for payment after already paid
- Keyboard overlaying results making it difficult to see

**Requested features**

- Add more electrical conversions and calculations
- Add ability to input voltage and resistance to get amps and watts
- Add kVA, rms, and other popular needed conversions


### Device Configuration

[App page](https://appshunter.io/ios/app/device-configuration/id1643687706)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ohms Law Calc. free?

Ohms Law Calc. is free to download, with in-app purchases available.

### Is Device Configuration free?

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

### Do Ohms Law Calc. or Device Configuration have ads?

Ohms Law Calc. shows ads; Device Configuration does not.

### Which is updated more often, Ohms Law Calc. or Device Configuration?

Ohms Law Calc. ships an update every 2 months, and Device Configuration every 3 months. Most recently, Ohms Law Calc. was updated on September 8, 2026 and Device Configuration on December 22, 2025.

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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.*