# Ohms Law Calc. vs DC Wire Sizer

The clearest difference is review sentiment: DC Wire Sizer at 100% against Ohms Law Calc.'s 50%. DC Wire Sizer also leads on in-app purchases (none vs 1) and ads (none vs shown). Ohms Law Calc.'s advantage is price (Free vs $2.99) and update cadence (every 2 months vs every 20 months). On device support there is nothing between them.

Ohms Law Calc. is free to download; DC Wire Sizer costs $2.99 up front. Ohms Law Calc. sells 1 one-off in-app purchase. DC Wire Sizer asks for nothing beyond the download.

DC Wire Sizer holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Ohms Law Calc. has 1.3K ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 50% of Ohms Law Calc.'s written reviews are positive against 100% of DC Wire Sizer's.

Ohms Law Calc. ships an update every 2 months, DC Wire Sizer every 20 months. The most recent releases landed on October 14, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Ohms Law Calc. | DC Wire Sizer |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [4.7 (1.3K ratings)](https://appshunter.io/ios/app/ohms-law-calc/id491898006/reviews) | **[5.0 (24 ratings)](https://appshunter.io/ios/app/dc-wire-sizer/id629190351/reviews)** |
| Number of ratings | **1.3K** | 24 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 20 months |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#169** |
| Size | 59 MB | 21 MB |
| Requires iOS | 17.6 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Dirty Dog Software, LLC](https://appshunter.io/developer/629190354) |

## 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


### DC Wire Sizer

[App page](https://appshunter.io/ios/app/dc-wire-sizer/id629190351)

**Currently charting:** #169 Top Paid · Utilities (US App Store)

Calculate appropriate DC wire sizes for electrical projects, preventing equipment damage and fires. Save, edit, and export wire run details for electrical plans and material purchases. Features a wizard for easy sizing for all users.

**Highlights:** Calculates wire size, voltage drop, and ampacity, Supports custom DC voltages up to 500 amps, Save, edit, and export wire run details, Sizer Wizard for easy calculations, Select marine standards (ABYC or ISO), Choose from various wire types and insulation ratings

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

**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 DC Wire Sizer free?

DC Wire Sizer costs $2.99, with no in-app purchases.

### Which has better reviews, Ohms Law Calc. or DC Wire Sizer?

DC Wire Sizer is rated higher. Ohms Law Calc. averages 4.7 out of 5 from 1.3K ratings, while DC Wire Sizer averages 5.0 from 24 ratings.

### Do Ohms Law Calc. or DC Wire Sizer have ads?

Ohms Law Calc. shows ads; DC Wire Sizer does not.

### Which is updated more often, Ohms Law Calc. or DC Wire Sizer?

Ohms Law Calc. ships an update every 2 months, and DC Wire Sizer every 20 months. Most recently, Ohms Law Calc. was updated on October 14, 2026 and DC Wire Sizer on October 3, 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.*