iCircuit vs 2017 Master Electrician Ref.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iCircuit
Design and simulate analog and digital electronic circuits in real-time. This app offers a comprehensive component library, built-in test equipment, and the ability to create custom elements. It's ideal for learning, prototyping, and validating designs without physical components.
- Real-time circuit simulation
- Extensive component library (300+)
- Built-in test equipment (multimeter, oscilloscope)
- Programmable Arduino and PIC microcontroller support
- Custom element creation and sharing
- Audio simulation
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iCircuit is the premier iPhone and iPad app for designing, simulating, and learning analog and digital electronics. Its advanced simulation engine provides real-time, always-on analysis so your circuits stay powered and live, just like working with real components. Use it like a CAD tool: add components, wire them up, and set their properties. But iCircuit is unlike typical CAD apps because it is always simulating. You do not stop to take a measurement or spend time configuring reports. Instead, you just play with the circuit as you normally would, with the power on. Build circuits with over 300 components, from simple resistors and LEDs to programmable Arduinos (Uno, Nano, Mega, ESP8266, ESP32), PIC microcontrollers, and 60 4000/7400-series digital ICs (more available with Pro). Connect elements, adjust values, and instantly see the results. BUILT-IN TEST EQUIPMENT • Multimeter: Probe any point to read voltage, current, and power • Oscilloscope: Track multiple signals with touch-controlled time scale, stacked/unstacked views, FFT analysis, and Bode plots • Gauges: Visualize voltages, currents, and frequencies directly in your circuit • Signal generators and configurable sources EXTENSIVE COMPONENT LIBRARY • Programmable Arduinos (Uno, Nano, Mega, ESP8266, ESP32) • Programmable PIC microcontrollers (assembly and HEX files, more available with Pro) • Power: Voltage regulators (78xx, LM317), sources, dependent sources, power jacks, and simulated antennas • Analog: Resistors, capacitors, inductors, diodes, BJTs, MOSFETs, thermistors, triodes, and tetrodes • Digital: Logic gates (AND, OR, NAND, NOR, XOR), JK and D flip-flops, and 60 4000/7400-series ICs (180+ available with Pro) • ADCs and DACs • Sensors and displays: LEDs, 7-segment, NeoPixels, matrix displays, thermistors • Electromechanical: Motors, servos, SPST/SPDT and DPST/DPDT switches, push buttons, relays, and speakers CREATE CUSTOM ELEMENTS Build sub-circuits and custom elements to componentize your designs and create reusable modules. Share your custom elements with others via the iCircuit Gallery. AUDIO SIMULATION Hear your circuits. Speakers, buzzers, and microphones produce real audio output. Perfect for students learning electronics, hobbyists prototyping projects, and engineers validating designs, all without burning out a single component. ABOUT ICIRCUIT PRO (OPTIONAL) iCircuit is a complete app with a one-time purchase. iCircuit Pro is optional and adds extra components (including more PICs and a larger 4000/7400 IC library) and helps fund ongoing development. Pro is not required for core simulation or everyday circuit design. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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.
- 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
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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
Verdict
The clearest difference is rating: 2017 Master Electrician Ref. at 4.7 against iCircuit's 3.8. 2017 Master Electrician Ref. also leads on in-app purchases (none vs 2) and price ($9.99 vs $12.99). iCircuit's advantage is update cadence (every 3 weeks vs every 5 months). On review sentiment, ads, monetization model and chart position 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
iCircuit costs $12.99 and 2017 Master Electrician Ref. $9.99 up front. iCircuit sells 2 in-app purchases, starting at $1.99 per month. 2017 Master Electrician Ref. asks for nothing beyond the download.
2017 Master Electrician Ref. holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: 2017 Master Electrician Ref. has 1.3K ratings behind it against 134, so its average is the more settled of the two. Written reviews point the same way: 61% of iCircuit's written reviews are positive against 67% of 2017 Master Electrician Ref.'s.
iCircuit ships an update every 3 weeks, 2017 Master Electrician Ref. every 5 months. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.
| Parameter | iCircuit | 2017 Master Electrician Ref. |
|---|---|---|
| Price | $12.99 | $9.99 — better |
| Rating | 3.8 (134 ratings) | 4.7 (1.3K ratings) — better |
| Positive reviews | 61.1% of reviews | 66.7% of reviews — better |
| Number of ratings | 134 | 1.3K — better |
| Update frequency | Every 3 weeks — better | Every 5 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Paid |
| Best chart rank | #142 | #62 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.2 | 12.0 — better |
| Further details — not scored | ||
| Size | 126 MB | 46 MB |
| Age rating | 4+ | 12+ |
| Developer | Krueger Systems, Inc. | PawEng, LLC |
Customer experience
iCircuit
2017 Master Electrician Ref.
User reviews
iCircuit
From 134 App Store ratingsWhat we love
- 🚀 Great for learning and testing
- 👍 Intuitive and easy to use
- 💡 Programmable Arduino integration
- 👍 Useful for hobbyists and students
Room to improve
- 🐛 Buggy and crashes frequently
- 🔧 Difficult to edit and delete components
- 🔧 Limited component library
- 🔧 Inaccurate simulation results in some cases
2017 Master Electrician Ref.
From 1.3K App Store ratingsWhat we love
- 👍 Quick reference
- 🚀 Best app for electrical information
- 🚀 Concise and well-laid out information
- 🚀 Comprehensive electrical references
Room to improve
- 🐛 App needs to be updated
- 🐛 Inaccurate information in some areas
- 🐛 Limited functionality compared to expectations
- 🐛 Overlapping table of contents
Bugs and requests
iCircuit
Reported bugs
4 issues- Oscilloscope and meter functions not working properly
- Saving and loading circuits can be unreliable
- Inconsistent behavior when rotating/flipping components
- Crashes when working with larger or more complex circuits
Requested features
5 requests- More components (e.g. transformers, triodes, MOSFETs)
- Ability to create custom components
- Frequency domain analysis (Bode plots, FFT)
- Improved wiring and component placement controls
- Better support for AC circuits and motors
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
iCircuit
- iCircuit Pro (Monthly)$1.991 Month
- iCircuit Pro (Yearly)$14.991 Year
2017 Master Electrician Ref.
No in-app purchases
Questions
Is iCircuit free?
Is 2017 Master Electrician Ref. free?
Which has better reviews, iCircuit or 2017 Master Electrician Ref.?
Do iCircuit or 2017 Master Electrician Ref. have ads?
Which is updated more often, iCircuit or 2017 Master Electrician Ref.?
Which is more popular, iCircuit or 2017 Master Electrician Ref.?
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