# Southwire® Voltage Drop Calc vs Orbitas

The clearest difference is rating: Orbitas at 5.0 against Southwire® Voltage Drop Calc's 4.6. Orbitas also leads on iOS requirement (13.0 vs 15.0). Southwire® Voltage Drop Calc's advantage is ratings volume (1.5K vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Orbitas holds the better App Store score, 5.0 against 4.6. 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.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 30, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Southwire® Voltage Drop Calc | Orbitas |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (1.5K ratings)](https://appshunter.io/ios/app/southwire-voltage-drop-calc/id440338420/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/orbitas/id1510752147/reviews)** |
| Number of ratings | **1.5K** | 2 |
| Positive reviews | 49.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 10 MB | 163 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Southwire Company](https://appshunter.io/developer/440338423) | [Tri-Global Technologies LLC](https://appshunter.io/developer/1031360631) |

## What reviewers say

### 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


### Orbitas

[App page](https://appshunter.io/ios/app/orbitas/id1510752147)

This app enables users to view accuracy and positional data from Asteri GNSS receivers. It allows for Real-Time Kinematic corrections and the collection of precise utility line information for above and below-ground features.

**Highlights:** View GNSS receiver accuracy and quality, Apply Real-Time Kinematic corrections, Utilize corrections in Apple software, Collect utility line information, Support for above and below-ground features

**In-app purchases:** none


## Frequently asked questions

### Is Southwire® Voltage Drop Calc free?

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

### Is Orbitas free?

Orbitas is free to download, with no in-app purchases.

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

Orbitas is rated higher. Southwire® Voltage Drop Calc averages 4.6 out of 5 from 1.5K ratings, while Orbitas averages 5.0 from 2 ratings.

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

Neither Southwire® Voltage Drop Calc nor Orbitas shows ads.

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

Southwire® Voltage Drop Calc ships an update every 2 months, and Orbitas every 2 months. Most recently, Southwire® Voltage Drop Calc was updated on October 30, 2026 and Orbitas 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.*