Mike Holt's Electrical Toolbox vs SuBinary 10
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mike Holt's Electrical Toolbox
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.
- Conductor sizing
- Voltage drop limitations
- Circuit protection sizing
- Race sizing
- Equipment grounding conductor sizing
- Dwelling-unit service calculations
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Mike Holt, the industry leader in the electrical industry (MikeHolt.com) has created an amazing, practical and useful app for the electrician, inspector, instructor, contractor and engineer. The app contains conductor sizing (including voltage drop limitations), circuit protection sizing, race sizing, equipment grounding conductor sizing for electric heating equipment (commercial and Residential), air-conditioning equipment (commercial and Residential), motors (commercial and Residential), Transformers (commercial) , and dwelling-unit service calculations and sizing.
SuBinary 10
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.
- Binary to Decimal conversion
- Hexadecimal to Octal conversion
- Supports multiple number systems
- Intuitive text input
- Real-time conversions
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Now you can convert Binary to Decimal, HexaDecimal to OctaDecimal or whatever you want. Just tap on the text area and enter values. Then, let them app convert for you.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Mike Holt's Electrical Toolbox | SuBinary 10 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (196 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 76.7% of reviews | — |
| Number of ratings | 196 — better | 3 |
| Update frequency | Every 3 months | Every 6 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 26 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Mike Holt Enterprises | Enes Akkus |
Customer experience
Mike Holt's Electrical Toolbox
SuBinary 10
Bugs and requests
Mike Holt's Electrical Toolbox
Reported bugs
4 issues- Cannot email results
- Video player widescreen exit bug
- Previous calculation data not erased
- App content is outdated
Requested features
6 requests- 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
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- Add more features, willing to pay extra
SuBinary 10
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Mike Holt's Electrical Toolbox
No in-app purchases
SuBinary 10
- Remove Ads$0.99
Questions
Is Mike Holt's Electrical Toolbox free?
Is SuBinary 10 free?
Which has better reviews, Mike Holt's Electrical Toolbox or SuBinary 10?
Do Mike Holt's Electrical Toolbox or SuBinary 10 have ads?
Which is updated more often, Mike Holt's Electrical Toolbox or SuBinary 10?
Other comparisons
