# Mike Holt's Electrical Toolbox vs Building Wire Selector

The clearest difference is rating: Building Wire Selector at 5.0 against Mike Holt's Electrical Toolbox's 4.6. Building Wire Selector also leads on review sentiment (100% vs 77%). Mike Holt's Electrical Toolbox's advantage is ratings volume (197 vs 2) and iOS requirement (14.0 vs 16.6). 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.

Building Wire Selector 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 2, 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 Building Wire Selector's.

Mike Holt's Electrical Toolbox ships an update every 3 months, Building Wire Selector every 2 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Mike Holt's Electrical Toolbox | Building Wire Selector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (197 ratings)](https://appshunter.io/ios/app/mike-holts-electrical-toolbox/id1406630647/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/building-wire-selector/id6670218338/reviews)** |
| Number of ratings | **197** | 2 |
| Positive reviews | 76.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 26 MB | 6 MB |
| Requires iOS | **14.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mike Holt Enterprises](https://appshunter.io/developer/1349960186) | [Southwire Company](https://appshunter.io/developer/440338423) |

## 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


### Building Wire Selector

[App page](https://appshunter.io/ios/app/building-wire-selector/id6670218338)

This tool helps determine the correct conductor size and wire type for electrical installations. It adheres to the National Electrical Code® wiring methods, ensuring compliance and safety.

**Highlights:** Conductor size determination, Wire and cable type selection, National Electrical Code compliance, Electrical installation guidance

**Features:** macOS Compatibility

**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 Building Wire Selector free?

Building Wire Selector is free to download, with no in-app purchases.

### Which has better reviews, Mike Holt's Electrical Toolbox or Building Wire Selector?

Building Wire Selector is rated higher. Mike Holt's Electrical Toolbox averages 4.6 out of 5 from 197 ratings, while Building Wire Selector averages 5.0 from 2 ratings.

### Do Mike Holt's Electrical Toolbox or Building Wire Selector have ads?

Neither Mike Holt's Electrical Toolbox nor Building Wire Selector shows ads.

### Which is updated more often, Mike Holt's Electrical Toolbox or Building Wire Selector?

Mike Holt's Electrical Toolbox ships an update every 3 months, and Building Wire Selector every 2 months. Most recently, Mike Holt's Electrical Toolbox was updated on October 26, 2026 and Building Wire Selector 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.*