# Ohm's Law Calculator vs SubEraser

The clearest difference is price: Ohm's Law Calculator at Free against SubEraser's $3.99. Ohm's Law Calculator also leads on iOS requirement (13.0 vs 18.4). SubEraser's advantage is in-app purchases (none vs 1) and update cadence (monthly vs every 17 months). On ads and device support there is nothing between them.

Ohm's Law Calculator is free to download; SubEraser costs $3.99 up front. Ohm's Law Calculator sells 1 one-off in-app purchase. SubEraser asks for nothing beyond the download.

Ohm's Law Calculator ships an update every 17 months, SubEraser monthly. The most recent releases landed on October 5, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Ohm's Law Calculator | SubEraser |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ohms-law-calculator/id1518919778/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 17 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 1 MB | 2 MB |
| Requires iOS | **13.0** | 18.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Phan Nhat Đang](https://appshunter.io/developer/1437390098) | [Cedrik Razafimanantsoa](https://appshunter.io/developer/1810428729) |

## What reviewers say

### Ohm's Law Calculator

[App page](https://appshunter.io/ios/app/ohms-law-calculator/id1518919778)

Easily calculate electrical values like voltage, current, resistance, and power. Input any two known values, and the app will automatically compute the rest. Supports various units for precise calculations.

**Highlights:** Calculate Voltage, Current, Resistance, Power, Automatic calculation of remaining values, Supports multiple units (kV, V, mV, A, mA, Ω, kΩ, MΩ, W, kW, MW, hp, BTU/hr), User-friendly interface, Contact developer for requests

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $1.99 | one-time |


### SubEraser

[App page](https://appshunter.io/ios/app/suberaser/id6745708274)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ohm's Law Calculator free?

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

### Is SubEraser free?

SubEraser costs $3.99, with no in-app purchases.

### Do Ohm's Law Calculator or SubEraser have ads?

Neither Ohm's Law Calculator nor SubEraser shows ads.

### Which is updated more often, Ohm's Law Calculator or SubEraser?

Ohm's Law Calculator ships an update every 17 months, and SubEraser monthly. Most recently, Ohm's Law Calculator was updated on October 5, 2026 and SubEraser 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.*