E vs Mike Holt's Electrical Toolbox
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
E
This tool helps determine technical characteristics of enamelled copper wire based on industry standards. It offers functions for diameter conversion, resistance calculations, and breakdown voltage.
- Diameter conversion (mm, inch, AWG)
- Resistance calculation
- Metal wire diameter calculation
- Resistance tolerance
- Enamelled copper quantity and length
- Breakdown voltage
- Winding tension calculation
- Overall diameter tolerance
Read full descriptionHide full description
E-Wire Calc is an enamelled copper wire (magnet wire) tool based on the industry standards IEC, NEMA or JIS. It provides several functions for the determination of various technical characteristics of the wire in the range 0,010 - 0,8 mm or AWG 58 - 20 respectively. The function DIAMETER allows the conversion of mm, inch and AWG The function RESISTANCE shows the nominal resistance for the given bare copper wire according to the set standard or calculates the diameter for the given resistance respectively The function METALS allows the calculation of bare wire diameters of different metals for a given resistance. The function RESISTANCE TOLERANCE shows the minimal and maximal permitted resistance for a given nominal copper wire diameter according to the set standard. The function SIZES calculates the quantity of enamelled copper for a selected unit of length, the length for a selected unit of quantity and the cross section for a given bare wire and outer diameter. The function BREAKDOWN VOLTAGE shows the minimum voltage of an enamelled copper wire with a given nominal diameter for different addition / increase classes. The function WINDING TENSION calculates the maximal winding tension in cN recommended by ELEKTRISOLA for a given nominal copper wire diameter. The function OVERALL DIAMETER TOLERANCE shows the minimal and maximal permitted outer diameter for an enamelled wire with a given nominal diameter in different addition / increase classes according to the set standard.
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
Read full descriptionHide full description
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.
Screenshots
Verdict
The clearest difference is rating: E at 5.0 against Mike Holt's Electrical Toolbox's 4.6. Mike Holt's Electrical Toolbox's advantage is update cadence (every 3 months vs every 18 months) and ratings volume (196 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.
E 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 1, so its average is the more settled of the two.
E ships an update every 18 months, Mike Holt's Electrical Toolbox every 3 months. The most recent releases landed on September 12, 2026 and October 21, 2026 respectively.
| Parameter | E | Mike Holt's Electrical Toolbox |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.6 (196 ratings) |
| Positive reviews | — | 76.7% of reviews |
| Number of ratings | 1 | 196 — better |
| Update frequency | Every 18 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 26 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | ELEKTRISOLA | Mike Holt Enterprises |
Customer experience
E
Mike Holt's Electrical Toolbox
Bugs and requests
E
Not enough reviews yet to summarise bugs or 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
Show 1 moreShow fewer
- Add more features, willing to pay extra
In-app purchases
E
No in-app purchases
Mike Holt's Electrical Toolbox
No in-app purchases
Questions
Is E free?
Is Mike Holt's Electrical Toolbox free?
Which has better reviews, E or Mike Holt's Electrical Toolbox?
Do E or Mike Holt's Electrical Toolbox have ads?
Which is updated more often, E or Mike Holt's Electrical Toolbox?
Other comparisons
