Mike Holt's Electrical Toolbox vs Digital Enrollment
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.
Digital Enrollment
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Digital Enrollment from Johnson Controls is an application used to program the range of fire alarm control units manufactured and sold by Johnson Controls, Inc. The application is capable of reading QR codes on Johnson Controls’ manufactured smoke detectors, ancillary modules, loop powered sounders & beacons and manual break glass call points. The QR code information is stored on the user’s smart device. The user can add a location label and other information to the scanned device information. The user can then upload the devices information into the addressable fire alarm control units via the configuration software
Screenshots
Verdict
The clearest difference is update cadence: Mike Holt's Electrical Toolbox at every 3 months against Digital Enrollment's every 18 months. On price, ads, in-app purchases and device support 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.
Mike Holt's Electrical Toolbox ships an update every 3 months, Digital Enrollment every 18 months. The most recent releases landed on October 21, 2026 and October 7, 2026 respectively.
| Parameter | Mike Holt's Electrical Toolbox | Digital Enrollment |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (196 ratings) — better | — |
| Positive reviews | 76.7% of reviews | — |
| Number of ratings | 196 — better | — |
| Update frequency | Every 3 months — better | Every 18 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 14.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 26 MB | 190 MB |
| Age rating | 4+ | 17+ |
| Developer | Mike Holt Enterprises | Johnson Controls, Inc. |
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
Digital Enrollment
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Mike Holt's Electrical Toolbox
No in-app purchases
Digital Enrollment
No in-app purchases
Questions
Is Mike Holt's Electrical Toolbox free?
Is Digital Enrollment free?
Do Mike Holt's Electrical Toolbox or Digital Enrollment have ads?
Which is updated more often, Mike Holt's Electrical Toolbox or Digital Enrollment?
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