# Ohms Law Calc. vs Simple Circuit Builder

The clearest difference is rating: Ohms Law Calc. at 4.7 against Simple Circuit Builder's 4.0. Ohms Law Calc. also leads on ratings volume (1.3K vs 28). Simple Circuit Builder's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, review sentiment and device support there is nothing between them.

Both are free to download. Ohms Law Calc. sells 1 one-off in-app purchase. Simple Circuit Builder asks for nothing beyond the download.

Ohms Law Calc. holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Ohms Law Calc. has 1.3K ratings behind it against 28, so its average is the more settled of the two. Written reviews complicate that: 50% of Ohms Law Calc.'s written reviews are positive against 53% of Simple Circuit Builder's, so the app with the better star average is not the one people write more warmly about.

Ohms Law Calc. ships an update every 2 months, Simple Circuit Builder every 3 weeks. The most recent releases landed on October 14, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Ohms Law Calc. | Simple Circuit Builder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.3K ratings)](https://appshunter.io/ios/app/ohms-law-calc/id491898006/reviews)** | [4.0 (28 ratings)](https://appshunter.io/ios/app/simple-circuit-builder/id1294616098/reviews) |
| Number of ratings | **1.3K** | 28 |
| Positive reviews | 50.0% of reviews | **52.6% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 59 MB | 14 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [David White](https://appshunter.io/developer/911163945) |

## 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


### Simple Circuit Builder

[App page](https://appshunter.io/ios/app/simple-circuit-builder/id1294616098)

This virtual lab offers a hands-on experience for learning about resistors and circuit resistance. Easily build and test series and parallel circuits, measure voltage and current, and understand the impact of component changes in real-time.

**Highlights:** Build circuits with up to eight components, Five component types, Virtual volt and amp meters, Adjustable resistor and voltage values, Real-time circuit analysis, Demonstrates 'Opens' and 'Shorts'

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ohms Law Calc. free?

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

### Is Simple Circuit Builder free?

Simple Circuit Builder is free to download, with no in-app purchases.

### Which has better reviews, Ohms Law Calc. or Simple Circuit Builder?

Ohms Law Calc. is rated higher. Ohms Law Calc. averages 4.7 out of 5 from 1.3K ratings, while Simple Circuit Builder averages 4.0 from 28 ratings.

### Do Ohms Law Calc. or Simple Circuit Builder have ads?

Ohms Law Calc. shows ads; Simple Circuit Builder does not.

### Which is updated more often, Ohms Law Calc. or Simple Circuit Builder?

Ohms Law Calc. ships an update every 2 months, and Simple Circuit Builder every 3 weeks. Most recently, Ohms Law Calc. was updated on October 14, 2026 and Simple Circuit Builder on October 1, 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.*