# Voltage Drop Calculator. vs Mike Holt's Electrical Toolbox

Voltage Drop Calculator. and Mike Holt's Electrical Toolbox both sit at 4.6 stars, but that hides the real split: 77% of Mike Holt's Electrical Toolbox's written reviews are positive against 33% of Voltage Drop Calculator.'s. Mike Holt's Electrical Toolbox also leads on in-app purchases (none vs 1) and ads (none vs shown). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Voltage Drop Calculator. sells 1 one-off in-app purchase. Mike Holt's Electrical Toolbox 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 Mike Holt's Electrical Toolbox. Both are backed by a comparable volume of ratings — 413 and 197 respectively. Written reviews are what separate them: 33% of Voltage Drop Calculator.'s written reviews are positive against 77% of Mike Holt's Electrical Toolbox's.

Both ship on a similar rhythm, roughly every 3 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | Voltage Drop Calculator. | Mike Holt's Electrical Toolbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (413 ratings)](https://appshunter.io/ios/app/voltage-drop-calculator/id1203737064/reviews) | **[4.6 (197 ratings)](https://appshunter.io/ios/app/mike-holts-electrical-toolbox/id1406630647/reviews)** |
| Number of ratings | **413** | 197 |
| Positive reviews | 33.3% of reviews | **76.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 51 MB | 26 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) | [Mike Holt Enterprises](https://appshunter.io/developer/1349960186) |

## 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 |


### Mike Holt's Electrical Toolbox

[App page](https://appshunter.io/ios/app/mike-holts-electrical-toolbox/id1406630647)

This app provides essential calculations for electricians, inspectors, contractors, and engineers. It helps determine conductor sizing, circuit protection, race sizing, and grounding conductor sizes for various electrical equipment and services.

**Highlights:** Conductor sizing, Voltage drop limitations, Circuit protection sizing, Race sizing, Equipment grounding conductor sizing, Dwelling-unit service calculations

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

**In-app purchases:** none

**What reviewers like**

- 👍 Great app for electricians
- 💡 Provides code article references
- 👍 Useful for on-the-spot reference
- 👍 Excellent for verifying calculations
- 👍 Helpful for exam preparation

**What reviewers complain about**

- 🐛 Emailing results not working
- 🐛 Outdated information
- 🐛 Load calc a little clunky
- 🐛 Content setup needs overhaul
- 🐛 Video series lacks completion system

**Reported bugs**

- Cannot email results
- Video player widescreen exit bug
- Previous calculation data not erased
- App content is outdated

**Requested features**

- Increase transformer capacity to 225kva
- Add option to print load calc
- Update to NEC 2020
- Add completion system for video series
- Refine user interface for better usability


## Frequently asked questions

### Is Voltage Drop Calculator. free?

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

### Is Mike Holt's Electrical Toolbox free?

Mike Holt's Electrical Toolbox is free to download, with no in-app purchases.

### Which has better reviews, Voltage Drop Calculator. or Mike Holt's Electrical Toolbox?

Mike Holt's Electrical Toolbox is rated higher. Voltage Drop Calculator. averages 4.6 out of 5 from 413 ratings, while Mike Holt's Electrical Toolbox averages 4.6 from 197 ratings.

### Do Voltage Drop Calculator. or Mike Holt's Electrical Toolbox have ads?

Voltage Drop Calculator. shows ads; Mike Holt's Electrical Toolbox does not.

### Which is updated more often, Voltage Drop Calculator. or Mike Holt's Electrical Toolbox?

Voltage Drop Calculator. ships an update every 3 months, and Mike Holt's Electrical Toolbox every 3 months. Most recently, Voltage Drop Calculator. was updated on November 2, 2026 and Mike Holt's Electrical Toolbox on November 2, 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.*