Comparison

ElectricalWiringPro vs 2017 Master Electrician Ref.

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

Head to head
About

ElectricalWiringPro

This app provides electrical code and design calculations for professionals working with wiring systems. It includes tools for ampacity, wire sizing, box fill, and conduit fill, based on the 2011 National Electrical Code.

Highlights
  • Ampacity and wire sizing calculations
  • Dwelling service size calculations
  • Box fill calculations
  • Conduit fill calculations
  • Color code references for phone and Ethernet
  • Receptacle configuration information
Features
Read full description

Electrical code & design calculators for electricians, engineers working with wiring systems and other electrical professionals. Written by a working Electrician using it on a daily basis. Calculations per 2011 National Electrical Code. o Ampacity / Wire Size - Wire Size -> Ampacity - Ampacity Needed -> Wire Size - Dwelling Service Size - GEC Size - EGC Size o Box Fill - Box Size from Wires / Devices - Box Size from Cables / Devices - Standard Box and Typical Plaster Ring Info o Conduit Fill - Conduit - Maximum # of Wires - Conduit Size Needed - Conduit % Full - Conduit Size Information - Wire Size Information o Other - Cover Depth - Phone Pin Color Codes - Ethernet (EIA/TIA568 a & B) Color Codes - Receptacle Configurations More features delivered as free upgrades. We hope you find the app useful.

About

2017 Master Electrician Ref.

This digital handbook provides electricians and related professionals with essential electrical formulas, diagrams, and reference tables. It offers calculations, a dictionary of terms, and detailed information on wiring, motors, transformers, and more, all accessible on a mobile device.

Highlights
  • Electrical formulas and calculations
  • Wiring diagrams for various systems
  • Motor and transformer specifications
  • Conductor and ampacity tables
  • Dictionary of electrician terms
  • NEMA standards and diagrams
  • Math and conversion tools
Features
Read full description

Master Electrician Reference (or MER for short) 2017 is your electronic pocket electrician reference guide. MER 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 to keep the most important information easily accessible on your iPhone, iPod Touch, or iPad. MER will even do calculations for you; something your old pocket reference book can't do. MER is divided into the following sections: * Simple Circuits - Ohm's law, series and parallel circuits, capacitance, inductance, impedance, and reactance. * Distributed Systems - Distribution wiring diagrams for 120, 208, 277, and 480 volts, color codes, breaker sizes, light switches and bells diagrams. * Electrical Formulas - Formulas for kVA, kW, and HP. * Color Codes - Color codes for capacitors and resistors. * 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. * Transformers - KVA ratings for single- and three-phase current, transformer formulas. * Conductor Properties - Conductor tables, AWG and metric wire sizes, twist-on pressure connectors, and wire combinations. * 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). * Metal Boxes - Images and sizes of metal boxes, junction / device boxes, junction / pull boxes. * Voltage Drop calculations * Dictionary of electrician terms * Insulation Charts - Table of cable and wire types * Electrical Symbols * NEMA - Plugs and wiring diagrams, enclosure types, standard underground boxes, standard fuse and breaker sizes, standard pull box / junction sizes, standard gutter and wire-ways, standard switchboards, standard busway, standard busbar ampacity, standard panelboard sizes, and standard disconnect sizes. * Math and Conversions - Formulas for algebra, geometry, fractions, temperature conversion, trig tables, unit conversions, metric prefixes, and conversions between inches and millimeters. * 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. * Conduit Weights * Copper Wire Cost * Hole Saw Sizes * Material Raceway Support * Lighting - Fluorescent, high-intensity discharge, incandescent, LED, and low-pressure sodium. * Standard Tool List * Torque - Lugs, bolts, and screws, tightening torque. * Dry, Damp, and Wet Locations * Hazardous Locations * Wiring Methods * Safety - Lock-out / tag-out (LOTO), and a 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) 2017. We also have MER apps available for NEC 2011 and NEC 2014 code years. Visit our website at MasterSparky.com for more information.

Screenshots

ElectricalWiringPro4 screens
2017 Master Electrician Ref.4 screens

Verdict

The call

The clearest difference is price: ElectricalWiringPro at Free against 2017 Master Electrician Ref.'s $9.99. ElectricalWiringPro also leads on update cadence (every 5 weeks vs every 5 months) and iOS requirement (9.0 vs 12.0). 2017 Master Electrician Ref.'s advantage is rating (4.7 vs 3.4) and review sentiment (67% vs 40%). On ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

ElectricalWiringPro is free to download; 2017 Master Electrician Ref. costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

2017 Master Electrician Ref. holds the better App Store score, 4.7 against 3.4. That said, the two scores are not equally well evidenced: 2017 Master Electrician Ref. has 1.3K ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 40% of ElectricalWiringPro's written reviews are positive against 67% of 2017 Master Electrician Ref.'s.

UpkeepUpdate frequency

ElectricalWiringPro ships an update every 5 weeks, 2017 Master Electrician Ref. every 5 months. The most recent releases landed on October 5, 2026 and October 18, 2026 respectively.

Scorecard7 real differences · 3 level
ElectricalWiringPro versus 2017 Master Electrician Ref.: the parameters behind the verdict, then further details
ParameterElectricalWiringPro2017 Master Electrician Ref.
PriceFree — better$9.99
Rating3.4 (8 ratings)4.7 (1.3K ratings) — better
Positive reviews40.0% of reviews66.7% of reviews — better
Number of ratings81.3K — better
Update frequencyEvery 5 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better12.0
Further details — not scored
Size16 MB46 MB
Age rating4+12+
DeveloperIntineo LLCPawEng, LLC

Customer experience

ElectricalWiringPro

All ratings8 ratings
Positive62.5%
Neutral12.5%
Negative25.0%
Written reviews15 reviews
Positive40.0%
Neutral20.0%
Negative40.0%

2017 Master Electrician Ref.

All ratings1,255 ratings
Positive92.7%
Neutral3.4%
Negative3.9%
Written reviews24 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Bugs and requests

ElectricalWiringPro

Not enough reviews yet to summarise bugs or requests.

2017 Master Electrician Ref.

Reported bugs

3 issues
  • Conduit fill information missing for certain types
  • Login screen freezes
  • Compatibility issues with older devices

Requested features

3 requests
  • Update to latest NEC code
  • Add calculation tools for conduit fill and voltage drop
  • Improve user interface and navigation

In-app purchases

None

ElectricalWiringPro

No in-app purchases

None

2017 Master Electrician Ref.

No in-app purchases

Questions

Is ElectricalWiringPro free?
ElectricalWiringPro is free to download, with no in-app purchases.
Is 2017 Master Electrician Ref. free?
2017 Master Electrician Ref. costs $9.99, with no in-app purchases.
Which has better reviews, ElectricalWiringPro or 2017 Master Electrician Ref.?
2017 Master Electrician Ref. is rated higher. ElectricalWiringPro averages 3.4 out of 5 from 8 ratings, while 2017 Master Electrician Ref. averages 4.7 from 1.3K ratings.
Do ElectricalWiringPro or 2017 Master Electrician Ref. have ads?
Neither ElectricalWiringPro nor 2017 Master Electrician Ref. shows ads.
Which is updated more often, ElectricalWiringPro or 2017 Master Electrician Ref.?
ElectricalWiringPro ships an update every 5 weeks, and 2017 Master Electrician Ref. every 5 months. Most recently, ElectricalWiringPro was updated on October 5, 2026 and 2017 Master Electrician Ref. on October 18, 2026.

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