# Mike Holt's Electrical Toolbox vs SuBinary 10

The clearest difference is in-app purchases: Mike Holt's Electrical Toolbox at none against SuBinary 10's 1. Mike Holt's Electrical Toolbox also leads on ads (none vs shown) and ratings volume (196 vs 3). SuBinary 10's advantage is rating (5.0 vs 4.6) and update cadence (every 6 weeks vs every 3 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. SuBinary 10 sells 1 one-off in-app purchase. Mike Holt's Electrical Toolbox asks for nothing beyond the download.

SuBinary 10 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 196 ratings behind it against 3, so its average is the more settled of the two.

Mike Holt's Electrical Toolbox ships an update every 3 months, SuBinary 10 every 6 weeks. The most recent releases landed on October 21, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Mike Holt's Electrical Toolbox | SuBinary 10 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (196 ratings)](https://appshunter.io/ios/app/mike-holts-electrical-toolbox/id1406630647/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/subinary-10/id1434307389/reviews)** |
| Number of ratings | **196** | 3 |
| Positive reviews | 76.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 26 MB | 15 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mike Holt Enterprises](https://appshunter.io/developer/1349960186) | [Enes Akkus](https://appshunter.io/developer/1416782412) |

## 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


### SuBinary 10

[App page](https://appshunter.io/ios/app/subinary-10/id1434307389)

Easily convert between binary, decimal, hexadecimal, and octal number systems. Simply input your values into the text area and let the application perform the conversions for you.

**Highlights:** Binary to Decimal conversion, Hexadecimal to Octal conversion, Supports multiple number systems, Intuitive text input, Real-time conversions

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## 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 SuBinary 10 free?

SuBinary 10 is free to download, with in-app purchases available.

### Which has better reviews, Mike Holt's Electrical Toolbox or SuBinary 10?

SuBinary 10 is rated higher. Mike Holt's Electrical Toolbox averages 4.6 out of 5 from 196 ratings, while SuBinary 10 averages 5.0 from 3 ratings.

### Do Mike Holt's Electrical Toolbox or SuBinary 10 have ads?

SuBinary 10 shows ads; Mike Holt's Electrical Toolbox does not.

### Which is updated more often, Mike Holt's Electrical Toolbox or SuBinary 10?

Mike Holt's Electrical Toolbox ships an update every 3 months, and SuBinary 10 every 6 weeks. Most recently, Mike Holt's Electrical Toolbox was updated on October 21, 2026 and SuBinary 10 on October 8, 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.*