Partial Reel Calculator vs Mike Holt's Electrical Toolbox
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Partial Reel Calculator
This utility app helps estimate the remaining wire or cable footage on a reel. It comes preloaded with common cables and reels, and allows users to create custom favorites for quick access.
- Estimates wire/cable footage on reels
- Preloaded with common cables and reels
- Create custom favorite cables and reels
- Available for iPad and iPhone
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Southwire’s Partial Reel Calculator estimates the footage of wire or cable that is left on a reel. Preloaded with many cables and reels. Build your own favorite cables and reels for convenience. Available for the iPad and iPhone.
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.
Screenshots
Verdict
The clearest difference is rating: Mike Holt's Electrical Toolbox at 4.6 against Partial Reel Calculator's 2.4. Mike Holt's Electrical Toolbox also leads on review sentiment (77% vs 44%) and ratings volume (198 vs 14). On price, update cadence, ads and in-app purchases 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 holds the better App Store score, 4.6 against 2.4. That said, the two scores are not equally well evidenced: Mike Holt's Electrical Toolbox has 198 ratings behind it against 14, so its average is the more settled of the two. Written reviews point the same way: 44% of Partial Reel Calculator's written reviews are positive against 77% of Mike Holt's Electrical Toolbox's.
Partial Reel Calculator ships an update every 4 months, Mike Holt's Electrical Toolbox every 3 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.
| Parameter | Partial Reel Calculator | Mike Holt's Electrical Toolbox |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (14 ratings) | 4.6 (198 ratings) — better |
| Positive reviews | 44.4% of reviews | 76.7% of reviews — better |
| Number of ratings | 14 | 198 — better |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 14.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Southwire Company | Mike Holt Enterprises |
Customer experience
Partial Reel Calculator
Mike Holt's Electrical Toolbox
Bugs and requests
Partial Reel Calculator
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
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- Add more features, willing to pay extra
In-app purchases
Partial Reel Calculator
No in-app purchases
Mike Holt's Electrical Toolbox
No in-app purchases
Questions
Is Partial Reel Calculator free?
Is Mike Holt's Electrical Toolbox free?
Which has better reviews, Partial Reel Calculator or Mike Holt's Electrical Toolbox?
Do Partial Reel Calculator or Mike Holt's Electrical Toolbox have ads?
Which is updated more often, Partial Reel Calculator or Mike Holt's Electrical Toolbox?
Other comparisons
