# Ohms Law vs Multimeter Wizard

The clearest difference is in-app purchases: Ohms Law at none against Multimeter Wizard's 1. Ohms Law also leads on rating (4.3 vs 4.0). On price, ratings volume, update cadence and ads there is nothing between them.

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

Ohms Law holds the better App Store score, 4.3 against 4.0. Both are backed by a comparable volume of ratings — 7 and 4 respectively.

Ohms Law ships an update every 16 months, Multimeter Wizard every 10 months. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Ohms Law | Multimeter Wizard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (7 ratings)](https://appshunter.io/ios/app/ohms-law/id590727537/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/multimeter-wizard/id1516673071/reviews) |
| Number of ratings | **7** | 4 |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 16 months | **Every 10 months** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 12 MB | 17 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pro Certs Software Ltd](https://appshunter.io/developer/444429696) | [Blackstar Software Ltd](https://appshunter.io/developer/1516673070) |

## 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


### Multimeter Wizard

[App page](https://appshunter.io/ios/app/multimeter-wizard/id1516673071)

This app helps new multimeter users understand readings by automatically converting measurements to their basic units. It provides detailed conversion steps to aid learning and build confidence. Suggestions for improvement are welcome.

**Highlights:** Automatic unit conversion, Detailed conversion steps, Learning aid for multimeter use, Supports V, Ω, and A units, User suggestion feedback

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Adverts | $0.99 | one-time |


## Frequently asked questions

### Is Ohms Law free?

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

### Is Multimeter Wizard free?

Multimeter Wizard is free to download, with in-app purchases available.

### Which has better reviews, Ohms Law or Multimeter Wizard?

Ohms Law is rated higher. Ohms Law averages 4.3 out of 5 from 7 ratings, while Multimeter Wizard averages 4.0 from 4 ratings.

### Do Ohms Law or Multimeter Wizard have ads?

Both Ohms Law and Multimeter Wizard show ads.

### Which is updated more often, Ohms Law or Multimeter Wizard?

Ohms Law ships an update every 16 months, and Multimeter Wizard every 10 months. Most recently, Ohms Law was updated on October 14, 2026 and Multimeter Wizard on October 8, 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.*