MasterElec vs VoltForge
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.
VoltForge
This app provides electricians with essential field calculators, up-to-date code references, and a job estimator. It offers tools for Ohm's Law, voltage drop, conduit bending, and wire ampacity, all accessible offline. Pro features are available as a one-time purchase.
- Ohm's Law & Voltage Drop Calculator
- Fraction & Wire Ampacity Tables
- Conduit Bending & Fill Calculators
- Wire Pull Tension Calculator
- NEC 2023 Quick Reference
- Job Estimator with PDF Export
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Built for the field, not the classroom. VoltForge puts precision calculators, NEC 2023 code references, and a professional job estimator in your pocket. Built for journeymen, master electricians, and apprentices who need fast, accurate answers on the job site. Launch pad home screen. Light and dark mode. Large tap targets. Fully offline. No ads. No subscriptions. FREE TOOLS OHM'S LAW & VOLTAGE DROP Solve for any value from any two inputs. Voltage drop supports 1-phase and 3-phase, copper and aluminum, 14 AWG to 500 kcmil, 120V to 600V. Auto-suggests correct wire size when over NEC 3% limit. Includes 3-phase kVA, kW, kVAR, and HP calculator. FRACTION CALCULATOR Tap-style keyboard with denominators from halves to 64ths. Add, subtract, multiply, and divide. Displays fraction and decimal simultaneously. WIRE AMPACITY TABLE NEC Table 310.15(B) for copper and aluminum, 14 AWG through 1000 kcmil. Includes derating calculator for conductor count and temperature correction table. PRO TOOLS - One-time $4.99, yours forever CONDUIT BENDING CALCULATOR All six bend types: 90 Stub, Back-to-Back, Offset, 3-Point Saddle, 4-Point Saddle, Rolling Offset. Enter measurements in feet and inches. Marks display in feet and fractions to the nearest 1/8". EMT 1/2" through 4". CONDUIT FILL CALCULATOR EMT, IMC, RMC, PVC 40/80, HDPE, LFMC up to 4". THHN/THWN, XHHW, RHH/RHW-2, THW/THHW up to 1000 kcmil. Shows fill %, jam ratio per NEC Ch.9, and ampacity derating warning for 4+ conductors. WIRE PULL TENSION CALCULATOR Build your pull route segment by segment. Calculates cumulative tension through straights and bends. Flags sidewall pressure violations. Pass/fail result with remedies when over limit. TRANSFORMER WIRING DIAGRAMS 7 configurations with schematic diagrams and field notes: 1-Phase 120/240V, 1-Phase 480V Step-Down, Delta-Wye, Wye-Delta, Delta-Delta, Wye-Wye, and Open Delta. Terminal reference and NEC field notes for each. NEC QUICK REFERENCE 20 searchable NEC 2023 sections: Working Clearances, Box Fill, GFCI, AFCI, Breaker Sizing, Feeder Sizing, Grounding, Service Entrance, Conduit Fill, Load Calculations, Motor Calculations, Panelboard Rules, Transformers, Torque Specs, and more. JOB ESTIMATOR + PDF EXPORT Material list with markup, labor, permit fee, and tax. Generates a professional PDF with company info, customer details, scope of work, line items, and signature blocks. Share via email, AirDrop, or any iOS share sheet. WHY VOLTFORGE - NEC 2023 - current code, not years-old data - Light and dark mode - tap to switch on the home screen - Fully offline - works anywhere, no signal needed - Fraction and feet/inches input - built for how electricians measure - No ads, no subscription - Pro is one purchase, forever - Large tap targets for gloved hands All calculations are for planning purposes. Always verify with your local AHJ.
Screenshots
Verdict
The clearest difference is update cadence: VoltForge at every 3 weeks against MasterElec's every 3 months. VoltForge also leads on iOS requirement (15.1 vs 17.0). MasterElec's advantage is ratings volume (4 vs 1). On price, rating, 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 VoltForge sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for MasterElec against 5.0 for VoltForge. Both are backed by a comparable volume of ratings — 4 and 1 respectively.
MasterElec ships an update every 3 months, VoltForge every 3 weeks. The most recent releases landed on October 10, 2026 and October 5, 2026 respectively.
| Parameter | MasterElec | VoltForge |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) | 5.0 (1 ratings) |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 28 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | TWOSCRIPTS LABS INC. | Clark Allen |
Customer experience
MasterElec
VoltForge
In-app purchases
MasterElec
- Weekly Susbcription3 Days trial$4.997 Days
- Annual Subscription$39.991 Year
VoltForge
- VoltForge Pro$4.99
Questions
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