Comparison

MasterElec vs FieldVolt Electrical

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Voice-first interface for queries
  • 100% offline functionality
  • NEC reference access
  • Professional electrical calculators
  • Bookmark and export calculations
  • Free daily voice queries
Features
Read full description

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.

About

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.

Highlights
  • 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
Features
Read full description

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

MasterElec4 screens
FieldVolt Electrical4 screens

Verdict

The call

The clearest difference is ratings volume: MasterElec at 4 against FieldVolt Electrical's 1. FieldVolt Electrical's advantage is iOS requirement (13.0 vs 17.0). On price, rating, update cadence and ads 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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for MasterElec against 5.0 for FieldVolt Electrical. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

UpkeepUpdate frequency

MasterElec ships an update every 3 months, FieldVolt Electrical every 2 months. The most recent releases landed on September 23, 2026 and August 3, 2026 respectively.

Scorecard2 real differences · 7 level
MasterElec versus FieldVolt Electrical: the parameters behind the verdict, then further details
ParameterMasterElecFieldVolt Electrical
PriceFreeFree
Rating5.0 (4 ratings)5.0 (1 ratings)
Number of ratings4 — better1
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.013.0 — better
Further details — not scored
Size28 MB66 MB
Age rating4+4+
DeveloperTWOSCRIPTS LABS INC.MATTHEW DAVID KOVALIK

Customer experience

MasterElec

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

FieldVolt Electrical

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

MasterElec

Subscriptions2
  • Weekly Susbcription3 Days trial$4.997 Days
  • Annual Subscription$39.991 Year
2 purchases

FieldVolt Electrical

Subscriptions2
  • FieldVolt Pro$4.991 Month
  • FieldVolt Pro$49.991 Year

Questions

Is MasterElec free?
MasterElec is free to download, with in-app purchases available.
Is FieldVolt Electrical free?
FieldVolt Electrical is free to download, with in-app purchases available.
Which has better reviews, MasterElec or FieldVolt Electrical?
MasterElec and FieldVolt Electrical are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.
Do MasterElec or FieldVolt Electrical have ads?
Neither MasterElec nor FieldVolt Electrical shows ads.
Which is updated more often, MasterElec or FieldVolt Electrical?
MasterElec ships an update every 3 months, and FieldVolt Electrical every 2 months. Most recently, MasterElec was updated on September 23, 2026 and FieldVolt Electrical on August 3, 2026.

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