Mike Holt's Electrical Toolbox vs Building Wire Reliability Calc
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.
Building Wire Reliability Calc
Calculate cable requirements for critical infrastructure. Optimize wire sizing for data centers, healthcare, and other heavily loaded systems. Ensure reliable electrical performance.
- Cable sizing for critical infrastructure
- Wire reliability calculations
- Supports data centers
- Supports healthcare facilities
- Optimizes heavily loaded systems
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Upgrade or upsize cables for critical infrastructure applications such as Data Centers, Healthcare Facilities, Wastewater Treatment Plants, Ports & Airports, or any heavily loaded systems.
Screenshots
Verdict
The clearest difference is rating: Building Wire Reliability Calc at 5.0 against Mike Holt's Electrical Toolbox's 4.6. Building Wire Reliability Calc also leads on update cadence (every 3 weeks vs every 3 months). Mike Holt's Electrical Toolbox's advantage is ratings volume (197 vs 1). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
Building Wire Reliability Calc 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 1, so its average is the more settled of the two.
Mike Holt's Electrical Toolbox ships an update every 3 months, Building Wire Reliability Calc every 3 weeks. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.
| Parameter | Mike Holt's Electrical Toolbox | Building Wire Reliability Calc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (197 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 76.7% of reviews | — |
| Number of ratings | 197 — better | 1 |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 26 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Mike Holt Enterprises | Southwire Company |
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
Building Wire Reliability Calc
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Mike Holt's Electrical Toolbox
No in-app purchases
Building Wire Reliability Calc
No in-app purchases
Questions
Is Mike Holt's Electrical Toolbox free?
Is Building Wire Reliability Calc free?
Which has better reviews, Mike Holt's Electrical Toolbox or Building Wire Reliability Calc?
Do Mike Holt's Electrical Toolbox or Building Wire Reliability Calc have ads?
Which is updated more often, Mike Holt's Electrical Toolbox or Building Wire Reliability Calc?
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