# Ohms Law Calc. vs QR Code Generator Studio

The clearest difference is ads: QR Code Generator Studio at none against Ohms Law Calc.'s shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Ohms Law Calc. sells 1 one-off in-app purchase and QR Code Generator Studio sells 1 in-app purchase, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Ohms Law Calc. ships an update every 2 months, QR Code Generator Studio monthly. The most recent releases landed on October 14, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Ohms Law Calc. | QR Code Generator Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.3K ratings)](https://appshunter.io/ios/app/ohms-law-calc/id491898006/reviews)** | — |
| Number of ratings | **1.3K** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 5 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [PocketKnife Apps Inc.](https://appshunter.io/developer/6789822731) |

## What reviewers say

### Ohms Law Calc.

[App page](https://appshunter.io/ios/app/ohms-law-calc/id491898006)

This app provides a comprehensive suite of electrical calculations, including Ohm's Law, voltage drop, wire sizing, and impedance. It also offers numerous converters for various electrical units and parameters, aiding in circuit design and analysis.

**Highlights:** Ohm's Law calculations, Voltage drop calculator, Wire size calculator, Impedance calculations (R, L, C), Electrical unit converters, Power and current conversions, Circuit design tools

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ohms Law Calc. | $3.99 | one-time |

**What reviewers like**

- 🚀 Great value
- 🚀 Works perfectly
- 🚀 Fantastic app
- 👍 Best thing since sliced bread
- 🚀 Useful for electrical work

**What reviewers complain about**

- 👎 Have to pay again for an app already purchased
- 👎 Not easy to use
- 🐛 Paid but not unlocked, no response from developer
- 👎 Annoying pop-ups
- 🐛 Keeps shutting down

**Reported bugs**

- Paid version not unlocking
- Repeatedly prompting for payment after already paid
- Keyboard overlaying results making it difficult to see

**Requested features**

- Add more electrical conversions and calculations
- Add ability to input voltage and resistance to get amps and watts
- Add kVA, rms, and other popular needed conversions


### QR Code Generator Studio

[App page](https://appshunter.io/ios/app/qr-code-generator-studio/id6789824379)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| QR Scan Pro | $7.99 | per 7 days |


## Frequently asked questions

### Is Ohms Law Calc. free?

Ohms Law Calc. is free to download, with in-app purchases available.

### Is QR Code Generator Studio free?

QR Code Generator Studio is free to download, with in-app purchases available.

### Do Ohms Law Calc. or QR Code Generator Studio have ads?

Ohms Law Calc. shows ads; QR Code Generator Studio does not.

### Which is updated more often, Ohms Law Calc. or QR Code Generator Studio?

Ohms Law Calc. ships an update every 2 months, and QR Code Generator Studio monthly. Most recently, Ohms Law Calc. was updated on October 14, 2026 and QR Code Generator Studio on October 4, 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.*