# Mike Holt's Electrical Toolbox vs Sparky Toolbox

The clearest difference is price: Mike Holt's Electrical Toolbox at Free against Sparky Toolbox's $19.99. Mike Holt's Electrical Toolbox also leads on ratings volume (197 vs 4). Sparky Toolbox's advantage is update cadence (every 5 days vs every 3 months) and rating (5.0 vs 4.6). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Mike Holt's Electrical Toolbox is free to download; Sparky Toolbox costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sparky Toolbox holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Mike Holt's Electrical Toolbox has 197 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 77% of Mike Holt's Electrical Toolbox's written reviews are positive against 100% of Sparky Toolbox's.

Mike Holt's Electrical Toolbox ships an update every 3 months, Sparky Toolbox every 5 days. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Mike Holt's Electrical Toolbox | Sparky Toolbox |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | [4.6 (197 ratings)](https://appshunter.io/ios/app/mike-holts-electrical-toolbox/id1406630647/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/sparky-toolbox/id6782320797/reviews)** |
| Number of ratings | **197** | 4 |
| Positive reviews | 76.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | **Free** | Paid |
| Size | 26 MB | 23 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mike Holt Enterprises](https://appshunter.io/developer/1349960186) | [TrinFJHTechSolutions LLC](https://appshunter.io/developer/6782320799) |

## What reviewers say

### 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


### Sparky Toolbox

[App page](https://appshunter.io/ios/app/sparky-toolbox/id6782320797)

This app provides 9 essential electrical calculation tools for field electricians. Streamline project estimating, bidding, and field verification with instant results for Ohms Law, wire sizing, voltage drop, and more.

**Highlights:** 9 essential electrical calculators, Ohms Law calculations, Motor and Transformer OCPD & Wire Sizing, Conduit Fill and Voltage Drop calculators, Standard Dwelling Load and Transformer Sizing, Solar Panel calculator, Designed for field use with a clean interface

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

**In-app purchases:** none


## Frequently asked questions

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

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

### Is Sparky Toolbox free?

Sparky Toolbox costs $19.99, with no in-app purchases.

### Which has better reviews, Mike Holt's Electrical Toolbox or Sparky Toolbox?

Sparky Toolbox is rated higher. Mike Holt's Electrical Toolbox averages 4.6 out of 5 from 197 ratings, while Sparky Toolbox averages 5.0 from 4 ratings.

### Do Mike Holt's Electrical Toolbox or Sparky Toolbox have ads?

Neither Mike Holt's Electrical Toolbox nor Sparky Toolbox shows ads.

### Which is updated more often, Mike Holt's Electrical Toolbox or Sparky Toolbox?

Mike Holt's Electrical Toolbox ships an update every 3 months, and Sparky Toolbox every 5 days. Most recently, Mike Holt's Electrical Toolbox was updated on October 26, 2026 and Sparky Toolbox on October 24, 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.*