# Voltage Drop Calculator. vs Overhead Install Guide

The clearest difference is in-app purchases: Overhead Install Guide at none against Voltage Drop Calculator.'s 1. Overhead Install Guide also leads on ads (none vs shown). Voltage Drop Calculator.'s advantage is ratings volume (410 vs 5) and update cadence (every 3 months vs every 9 months). On price, rating, device support and iOS requirement there is nothing between them.

Both are free to download. Voltage Drop Calculator. sells 1 one-off in-app purchase. Overhead Install Guide asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for Voltage Drop Calculator. against 4.6 for Overhead Install Guide. That said, the two scores are not equally well evidenced: Voltage Drop Calculator. has 410 ratings behind it against 5, so its average is the more settled of the two.

Voltage Drop Calculator. ships an update every 3 months, Overhead Install Guide every 9 months. The most recent releases landed on September 18, 2026 and July 31, 2026 respectively.

## The numbers

| Metric | Voltage Drop Calculator. | Overhead Install Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (410 ratings)](https://appshunter.io/ios/app/voltage-drop-calculator/id1203737064/reviews) | [4.6 (5 ratings)](https://appshunter.io/ios/app/overhead-install-guide/id1353512021/reviews) |
| Number of ratings | **410** | 5 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 9 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 51 MB | 21 MB |
| Requires iOS | 17.6 | **16.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Southwire Company](https://appshunter.io/developer/440338423) |

## What reviewers say

### Voltage Drop Calculator.

[App page](https://appshunter.io/ios/app/voltage-drop-calculator/id1203737064)

Calculate voltage drop and wire size using both NEC and IEC standards. Supports various load types, conductor materials, and system configurations. Generates detailed reports for electricians, engineers, and contractors.

**Highlights:** NEC and IEC dual standards, Voltage drop and wire sizing calculations, Support for continuous load and corrections, Copper or Aluminum conductor options, Single-phase and three-phase systems, Automatic compliance checks, PDF report generation

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Go Pro | $4.99 | one-time |


### Overhead Install Guide

[App page](https://appshunter.io/ios/app/overhead-install-guide/id1353512021)

This utility app offers Southwire's official recommendations for installing overhead transmission electrical conductors. It provides essential field information and includes a calculator for determining bullwheel and block diameters.

**Highlights:** Overhead conductor installation recommendations, Information from Overhead Conductor Manual, Industry standard IEEE 524 data, Bullwheel and block diameter calculator

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Voltage Drop Calculator. free?

Voltage Drop Calculator. is free to download, with in-app purchases available.

### Is Overhead Install Guide free?

Overhead Install Guide is free to download, with no in-app purchases.

### Which has better reviews, Voltage Drop Calculator. or Overhead Install Guide?

Voltage Drop Calculator. and Overhead Install Guide are both rated 4.6 out of 5 on the App Store, from 410 and 5 ratings respectively.

### Do Voltage Drop Calculator. or Overhead Install Guide have ads?

Voltage Drop Calculator. shows ads; Overhead Install Guide does not.

### Which is updated more often, Voltage Drop Calculator. or Overhead Install Guide?

Voltage Drop Calculator. ships an update every 3 months, and Overhead Install Guide every 9 months. Most recently, Voltage Drop Calculator. was updated on September 18, 2026 and Overhead Install Guide on July 31, 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.*