MasterElec vs FieldVolt Electrical
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MasterElec
A voice-powered assistant for electricians that provides offline access to NEC references and professional calculators. Quickly get answers to code questions and perform calculations without needing an internet connection.
- Voice-first interface for queries
- 100% offline functionality
- NEC reference access
- Professional electrical calculators
- Bookmark and export calculations
- Free daily voice queries
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Stop pausing your workflow for manual code lookups. MasterElec is a voice-powered assistant built for electricians that works offline. Access NEC references and professional calculators entirely by voice—no signal required. Voice-First Interface: Ask "What's the ampacity for 3/0 copper?" and get instant answers. 100% Offline: Works in basements, job sites, anywhere—no internet needed. NEC Reference: Grounding, GFCI/AFCI requirements, ampacity tables, and more. Professional Calculators: Voltage Drop, Conduit Fill, Box Fill, and Grounding Sizing. Export Ready: Bookmark sections and export calculations as PDFs. Free users get 5 voice queries/day and basic calculators. Upgrade to Pro for unlimited access. Subscription information Subscription options include weekly and yearly plans and will be charged to your Apple ID account. • Payment will be charged at confirmation of purchase. • Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. • Renewal will be charged within 24 hours prior to the end of the current period. • You can manage or cancel your subscription in your App Store account settings. • Any unused portion of a free trial period, if offered, will be forfeited upon purchase. Terms of Use: https://www.twoscripts.com/terms-of-use/ Privacy Policy: https://www.twoscripts.com/privacy-policy/ MasterElec is an independent application and is not affiliated with or endorsed by the National Fire Protection Association (NFPA). NEC and National Electrical Code are trademarks of NFPA.
FieldVolt Electrical
This app assists electricians with complex calculations for pipe bending, conduit fill, ampacity, voltage drop, and box fill. It also offers a professional subscription for expert electrical advice and troubleshooting.
- Pipe bending calculations (offsets, saddles)
- Conduit fill calculations (NEC Table 1)
- Ampacity and wire sizing
- Voltage drop calculations
- Box fill calculations (NEC 314.16)
- Expert electrical advice subscription
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Built by a licensed electrician for work in the field. PIPE BENDING Offsets, 3-bend saddles, 4-bend saddles, rolled offsets, back-to-back 90s, and parallel offsets. Mark placement calculated from the working end. Shrink, gain, spacing — all of it. CONDUIT FILL NEC Table 1 calculations for mixed wire fills. Add conductors, get fill percentage. AMPACITY Wire sizing and derating for ambient temperature, number of current-carrying conductors, and conduit type. VOLTAGE DROP Feeder and branch circuit voltage drop for single-phase and three-phase systems. BOX FILL NEC 314.16 calculations for device, conductor, clamp, and support fitting fill. FIELDVOLT PRO Ask electrical questions, get straight answers. Code interpretation, troubleshooting, load calc logic — the kind of thinking you'd get from someone who's been in the trade for 30 years. 5 free sessions included. Pro subscription available at $4.99/month or $50/year. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: FieldVolt Electrical at 5.0 against MasterElec's 4.6. FieldVolt Electrical also leads on iOS requirement (13.0 vs 17.0). MasterElec's advantage is ratings volume (9 vs 1). 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. MasterElec sells 2 in-app purchases, starting at $4.99 per 7 days and FieldVolt Electrical sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
FieldVolt Electrical holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: MasterElec has 9 ratings behind it against 1, so its average is the more settled of the two.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.
| Parameter | MasterElec | FieldVolt Electrical |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (9 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 9 — better | 1 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Freemium |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 29 MB | 66 MB |
| Age rating | 4+ | 4+ |
| Developer | TWOSCRIPTS LABS INC. | MATTHEW DAVID KOVALIK |
Customer experience
MasterElec
FieldVolt Electrical
In-app purchases
MasterElec
- Weekly Susbcription3 Days trial$4.997 Days
- Annual Subscription$39.991 Year
FieldVolt Electrical
- FieldVolt Pro$4.991 Month
- FieldVolt Pro$49.991 Year
Questions
Is MasterElec free?
Is FieldVolt Electrical free?
Which has better reviews, MasterElec or FieldVolt Electrical?
Do MasterElec or FieldVolt Electrical have ads?
Which is updated more often, MasterElec or FieldVolt Electrical?
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