# Ohms Law vs Class Manager

The clearest difference is in-app purchases: Ohms Law at none against Class Manager's 5. Ohms Law also leads on update cadence (every 16 months vs every 35 months) and iOS requirement (12.0 vs 17.0). Class Manager's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Class Manager sells 5 one-off in-app purchases. Ohms Law asks for nothing beyond the download.

Ohms Law ships an update every 16 months, Class Manager every 35 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Ohms Law | Class Manager |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (7 ratings)](https://appshunter.io/ios/app/ohms-law/id590727537/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 16 months** | Every 35 months |
| Monetization | Ad-supported | — |
| Size | 12 MB | 5 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pro Certs Software Ltd](https://appshunter.io/developer/444429696) | [SportsViz Ltd.](https://appshunter.io/developer/535753392) |

## 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


### Class Manager

[App page](https://appshunter.io/ios/app/class-manager/id793155581)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 25 Member Pack | $3.99 | one-time |
| 50 Member Pack | $4.99 | one-time |
| 100 Member Pack | $6.99 | one-time |
| 200 Member Pack | $11.99 | one-time |
| 500 Member Pack | $17.99 | one-time |


## Frequently asked questions

### Is Ohms Law free?

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

### Is Class Manager free?

Class Manager is free to download, with in-app purchases available.

### Do Ohms Law or Class Manager have ads?

Ohms Law shows ads; Class Manager does not.

### Which is updated more often, Ohms Law or Class Manager?

Ohms Law ships an update every 16 months, and Class Manager every 35 months. Most recently, Ohms Law was updated on October 23, 2026 and Class Manager 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.*