# Easy Ohm's Law vs BM Hub

The clearest difference is update cadence: Easy Ohm's Law at every 3 months against BM Hub's every 9 months. Easy Ohm's Law also leads on iOS requirement (11.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Easy Ohm's Law sells 1 one-off in-app purchase and BM Hub sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Easy Ohm's Law ships an update every 3 months, BM Hub every 9 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Easy Ohm's Law | BM Hub |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.5 (2 ratings)](https://appshunter.io/ios/app/easy-ohms-law/id814088524/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 69.2% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 9 months |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 52 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [TagMango Inc](https://appshunter.io/developer/1611765353) |

## What reviewers say

### Easy Ohm's Law

[App page](https://appshunter.io/ios/app/easy-ohms-law/id814088524)

This app helps you calculate voltage, current, resistance, and power. Simply input any two values, and the rest will be automatically computed with adjusted units. It supports a wide range of languages for global accessibility.

**Highlights:** Calculate voltage, current, resistance, and power, Automatic unit adjustment, Input any two values for instant calculation, Supports 21 languages, Available on iPhone and iPad

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro feature | $1.99 | one-time |


### BM Hub

[App page](https://appshunter.io/ios/app/bm-hub/id6740744268)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Brand Magnet Challenge | $49.99 | one-time |


## Frequently asked questions

### Is Easy Ohm's Law free?

Easy Ohm's Law is free to download, with in-app purchases available.

### Is BM Hub free?

BM Hub is free to download, with in-app purchases available.

### Do Easy Ohm's Law or BM Hub have ads?

Neither Easy Ohm's Law nor BM Hub shows ads.

### Which is updated more often, Easy Ohm's Law or BM Hub?

Easy Ohm's Law ships an update every 3 months, and BM Hub every 9 months. Most recently, Easy Ohm's Law was updated on November 1, 2026 and BM Hub on October 30, 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.*