Master Electrician Ref. Lite vs Electrical Calculations
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Master Electrician Ref. Lite
This electronic pocket reference guide provides essential information for electrical professionals. It offers calculations, code tables, and detailed sections on motors, ampacities, grounding, and more, all accessible on your mobile device.
- Motor and wiring information
- Ampacity tables
- Conduit fill and grounding sizes
- Voltage drop calculations
- Conduit bending guide
- Integrated scientific calculator
- NEC code tables
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Master Electrician Reference Lite (or MER Lite for short) is your electronic pocket electrician reference guide. MER Lite is for electrical designers, engineers, installers, contractors, facility managers, inspectors, exam candidates, apprentices, electricians, journeymen, architects, and technicians. MER is for people doing residential, industrial, and commercial work. Simply, if you are a Master Sparky or work with electricity in any way, this reference guide is for you! Have you ever lost pages or had damaged pages in your pocket electricians reference? The solution is here: Use MER Lite to keep the most important information easily accessible on your iPhone, iPod Touch, or iPad. MER Lite will even do calculations for you; something your old pocket reference book can't do. MER Lite is divided into the following sections: * Motors and Wiring - Standard motor and motor starter sizes, tables of full-load currents, locked-rotor information, overload units, OCPD, nameplate information, synchronous motor speeds, three-phase STAR and DELTA diagrams, three-wire start-stop diagram, motor frame dimensions, and motor enclosure types. * Ampacities - Ampacities in raceway, cable, earth, and free air, and derating tables. * Conduit Fill table * Grounding Sizes - Equipment grounding conductor (EGC) and grounding electrode conductor (GEC). * Voltage Drop calculations * Conduit Bending - Includes the guide "The Master Bender Way" on how to bend conduit. See the Master Bender app or MasterBender.com website for more information. * Standard Tool List * Safety - Safety manual and first aid. Most pages contain a general scientific calculator. It is expression based: Just enter an expression and evaluate it. It understands trig and power functions, can convert between radians and degrees, and has built-in basic constants like pi and e. MER includes key NEC tables from the National Electrical Code (NEC) 2011. Visit our website at MasterSparky.com for more information. If you like MER Lite, you will love the full MER. It contains much more information. The full MER are available in versions covering the NEC 2011, 2014, and 2017 code years.
Electrical Calculations
This app provides a comprehensive suite of electrical calculations for professionals. It supports various international standards and offers detailed reports in PDF format. The tool covers wiring, power, motor, and electronic calculations, along with extensive conversion tables and resources.
- Wire size and voltage drop calculations
- Power, current, and resistance calculations
- Motor performance and connection diagrams
- Electronic component calculations
- Extensive unit conversions
- PDF report generation
- Support for IEC, CEI, NEC, CEC standards
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Electrical Calculations is the PROFESSIONAL app for those who work with electrical systems every day: design, size and verify in just seconds, from the job site or the office. Over 200 calculations, diagrams, formulas and tables in a single app, with clear, printable PDF reports to attach to your documents. Designed for electricians, installers, designers and surveyors, it saves you time and helps you avoid mistakes: from cable sizing to short circuit. COMPLIANT WITH STANDARDS Reliable results aligned with the main standards: IEC (International Electrotechnical Commission), CEI (Italian Electrotechnical Committee), NEC (National Electrical Code), CEC (Canadian Electrical Code). WHY CHOOSE IT SAVE TIME: the calculations you'd do by hand, instantly available here. AVOID ERRORS: verified formulas and up-to-date regulatory parameters. PROFESSIONAL REPORTS: PDF reports ready for printing and archiving. ALWAYS WITH YOU: over 200 tools including calculations, converters, tables and pinouts. THE MOST USED CALCULATIONS Cable sizing and coordination with the protective device, voltage drop, operating current, current intensity, voltage and power (active, reactive, apparent). Power factor and power factor correction. Current capacity of conductors and busbars, sizing of conduits and trunking, maximum cable length. SHORT CIRCUIT AND PROTECTION Short-circuit current at a point on the line, earthing system and coordination with the residual current device, cable protection against short circuit (K²S²), power loss, cable temperature, neutral current. ELECTRIC MOTOR Motor current, power, voltage, efficiency and power factor, slip, speed, maximum torque and full-load current. Three-phase motor connection diagrams, terminal markings. Three-phase to single-phase. ELECTRONICS Color and alphanumeric codes for resistors, capacitors and inductors, SMD code, LED resistor, voltage and current divider, Zener diode, battery life, resonant frequency, fuses and transformers. CONVERSIONS Delta-star, AWG, SWG, cross-section, length, energy, temperature, pressure, Ah/kWh, var/µF, Gauss/Tesla, RPM and many more. RESOURCES AND TABLES Tripping curves, cable reactance and resistivity, cable dimensions and weight, distribution systems (TT, TN, IT), IP/IK/NEMA protection ratings, ATEX marking, insulation classes, electrical symbols, ANSI device codes, plugs and sockets, IEC 60309, NEMA and EV charging connectors, SI prefixes and units of measurement, thermistors and thermocouples. PINOUTS Ethernet RJ-45, Ethernet with PoE, USB, HDMI, VGA, DVI, RS-232, FireWire, SATA, DisplayPort, Apple Lightning, Raspberry Pi, OBD II, XLR audio/DMX, MIDI, Jack, RCA, Thunderbolt, SD Card, SIM Card and LED. Stop searching everywhere for formulas and tables: PUT YOUR ENTIRE ELECTRICAL LAB IN YOUR SMARTPHONE. Download Electrical Calculations and work faster, with standards-compliant results. Terms of service (EULA): https://www.egalnetsoftwares.com/terms_of_service_app/
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Verdict
Master Electrician Ref. Lite and Electrical Calculations both sit at 4.7 stars, but that hides the real split: 87% of Electrical Calculations's written reviews are positive against 50% of Master Electrician Ref. Lite's. Electrical Calculations also leads on update cadence (every 3 weeks vs every 4 months). Master Electrician Ref. Lite's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price, rating 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. Electrical Calculations sells 3 in-app purchases, starting at $3.99 per 3 months. Master Electrician Ref. Lite asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.7 for Master Electrician Ref. Lite against 4.6 for Electrical Calculations. That said, the two scores are not equally well evidenced: Master Electrician Ref. Lite has 2.5K ratings behind it against 128, so its average is the more settled of the two. Written reviews are what separate them: 50% of Master Electrician Ref. Lite's written reviews are positive against 87% of Electrical Calculations's.
Master Electrician Ref. Lite ships an update every 4 months, Electrical Calculations every 3 weeks. The most recent releases landed on October 9, 2026 and October 15, 2026 respectively.
| Parameter | Master Electrician Ref. Lite | Electrical Calculations |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (2.5K ratings) — better | 4.6 (128 ratings) |
| Positive reviews | 50.0% of reviews | 86.7% of reviews — better |
| Number of ratings | 2.5K — better | 128 |
| Update frequency | Every 4 months | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.4 — better | 15.0 |
| Further details — not scored | ||
| Size | 46 MB | 56 MB |
| Age rating | 12+ | 4+ |
| Developer | PawEng, LLC | Egal Net di Ettore Gallina |
Customer experience
Master Electrician Ref. Lite
Electrical Calculations
In-app purchases
Master Electrician Ref. Lite
No in-app purchases
Electrical Calculations
- PRO Version (3 months)$3.993 Months
- PRO Version (1 year)7 Days trial$7.491 Year
- PRO Version (Lifetime)$89.99
Questions
Is Master Electrician Ref. Lite free?
Is Electrical Calculations free?
Which has better reviews, Master Electrician Ref. Lite or Electrical Calculations?
Do Master Electrician Ref. Lite or Electrical Calculations have ads?
Which is updated more often, Master Electrician Ref. Lite or Electrical Calculations?
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