# Electrical Calc vs Southwire® Voltage Drop Calc

The clearest difference is price: Southwire® Voltage Drop Calc at Free against Electrical Calc's $19.99. Southwire® Voltage Drop Calc also leads on rating (4.6 vs 2.5) and ratings volume (1.5K vs 2). Electrical Calc's advantage is review sentiment (89% vs 49%) and iOS requirement (8.0 vs 15.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Southwire® Voltage Drop Calc is free to download; Electrical Calc costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Southwire® Voltage Drop Calc holds the better App Store score, 4.6 against 2.5. That said, the two scores are not equally well evidenced: Southwire® Voltage Drop Calc has 1.5K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 89% of Electrical Calc's written reviews are positive against 49% of Southwire® Voltage Drop Calc's, so the app with the better star average is not the one people write more warmly about.

Electrical Calc ships an update every 5 weeks, Southwire® Voltage Drop Calc every 2 months. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Electrical Calc | Southwire® Voltage Drop Calc |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/electrical-calc/id375591374/reviews) | **[4.6 (1.5K ratings)](https://appshunter.io/ios/app/southwire-voltage-drop-calc/id440338420/reviews)** |
| Number of ratings | 2 | **1.5K** |
| Positive reviews | **89.2% of reviews** | 49.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Paid | **Free** |
| Size | 23 MB | 10 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Snappy Appz Inc.](https://appshunter.io/developer/375591377) | [Southwire Company](https://appshunter.io/developer/440338423) |

## What reviewers say

### Electrical Calc

[App page](https://appshunter.io/ios/app/electrical-calc/id375591374)

This professional electrical application assists electricians and engineers with complex calculations based on the Canadian Electric Code. It offers features for wire and conduit sizing, motor and transformer load calculations, voltage drop, and more. Easily generate panel legends and access in-app support.

**Highlights:** Wire and conduit sizing, Motor and transformer load calculations, Voltage drop calculations, Panel legend creation and export, Allowable ampacity and derating, Box fill calculations, Unit conversions

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

**In-app purchases:** none

**What reviewers like**

- 👍 Handy and useful for electricians
- 🚀 Saves time on the job
- ✅ Accurate calculations
- 💡 Constantly updated with code books
- 👍 Easy to use and navigate

**What reviewers complain about**

- 🐛 Voltage drop calculator may be incorrect
- 🐛 Pipe fill calculator difficult with different wire sizes
- 🐛 Needs better tutorials
- 🐛 Some users report mistakes/errors
- 🐛 Not following Quebec's electrical code

**Reported bugs**

- Voltage drop calculator does not seem correct
- Pipe fill calculator difficult to use
- Trouble using wire size calculations
- Mistakes when using the app
- App does not follow Quebec's electrical code

**Requested features**

- Add a DC voltage drop calculator
- Include a demand load factor calculator
- Add more electrical conversions (amps to milliamps, farads to microfarads)
- Add an electronics section with component dictionary and resistor color code calculator
- Update for 2015 code book


### Southwire® Voltage Drop Calc

[App page](https://appshunter.io/ios/app/southwire-voltage-drop-calc/id440338420)

Calculate the appropriate wire size for electrical circuits. This tool helps determine wire size based on voltage drop and current carrying capacity, ensuring compliance with NEC ampacity limits.

**Highlights:** Determine wire size for voltage drop, Calculate voltage drop for conductor runs, Limit wire size by voltage drop, Limit wire size by NEC ampacity, Supports AWG and KCMIL sizes

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Quick and useful
- 🚀 Great Quick Reference
- 👍 A must have app for electricians
- 👍 Love These
- 👍 Electrical Engineer

**What reviewers complain about**

- 🐛 Motor starting Voltage drop
- 🐛 Useless!
- 🐛 Won't work
- 🐛 How to use
- 🐛 Confused

**Reported bugs**

- Useless!
- Won't work
- How to use
- Confused
- Bad app

**Requested features**

- Motor starting Voltage drop calculation
- Metric wire size options


## Frequently asked questions

### Is Electrical Calc free?

Electrical Calc costs $19.99, with no in-app purchases.

### Is Southwire® Voltage Drop Calc free?

Southwire® Voltage Drop Calc is free to download, with no in-app purchases.

### Which has better reviews, Electrical Calc or Southwire® Voltage Drop Calc?

Southwire® Voltage Drop Calc is rated higher. Electrical Calc averages 2.5 out of 5 from 2 ratings, while Southwire® Voltage Drop Calc averages 4.6 from 1.5K ratings.

### Do Electrical Calc or Southwire® Voltage Drop Calc have ads?

Neither Electrical Calc nor Southwire® Voltage Drop Calc shows ads.

### Which is updated more often, Electrical Calc or Southwire® Voltage Drop Calc?

Electrical Calc ships an update every 5 weeks, and Southwire® Voltage Drop Calc every 2 months. Most recently, Electrical Calc was updated on October 24, 2026 and Southwire® Voltage Drop Calc on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*