# Ohms Law vs Tone Generator

The clearest difference is rating: Tone Generator at 4.8 against Ohms Law's 4.3. Tone Generator also leads on update cadence (every 4 months vs every 16 months) and ratings volume (138 vs 7). Ohms Law's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 16.0). On price, ads and device support there is nothing between them.

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

Tone Generator holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Tone Generator has 138 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 70% of Ohms Law's written reviews are positive against 84% of Tone Generator's.

Ohms Law ships an update every 16 months, Tone Generator every 4 months. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Ohms Law | Tone Generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (7 ratings)](https://appshunter.io/ios/app/ohms-law/id590727537/reviews) | **[4.8 (138 ratings)](https://appshunter.io/ios/app/tone-generator-frequency-app/id1561496708/reviews)** |
| Number of ratings | 7 | **138** |
| Positive reviews | 70.0% of reviews | **83.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 16 months | **Every 4 months** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 12 MB | 6 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pro Certs Software Ltd](https://appshunter.io/developer/444429696) | [Tevfik Yucek](https://appshunter.io/developer/566982862) |

## 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


### Tone Generator

[App page](https://appshunter.io/ios/app/tone-generator-frequency-app/id1561496708)

Generate various audio tones like sine, square, sawtooth, and triangle waves across a wide frequency range. Adjust frequencies by swiping and utilize built-in features for fun hearing tests or to clean your device's speaker.

**Highlights:** Sine, square, sawtooth, triangle wave generation, Adjustable frequency via swipe, Built-in hearing test sweep, Speaker cleaning function, Large frequency range

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Advertisements | $2.99 | one-time |


## Frequently asked questions

### Is Ohms Law free?

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

### Is Tone Generator free?

Tone Generator is free to download, with in-app purchases available.

### Which has better reviews, Ohms Law or Tone Generator?

Tone Generator is rated higher. Ohms Law averages 4.3 out of 5 from 7 ratings, while Tone Generator averages 4.8 from 138 ratings.

### Do Ohms Law or Tone Generator have ads?

Both Ohms Law and Tone Generator show ads.

### Which is updated more often, Ohms Law or Tone Generator?

Ohms Law ships an update every 16 months, and Tone Generator every 4 months. Most recently, Ohms Law was updated on October 14, 2026 and Tone Generator on October 15, 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.*