Comparison

Electrical Troubleshooting MS vs Avionics Pro

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

Head to head
About

Electrical Troubleshooting MS

Learn to troubleshoot electrical circuits with a virtual voltmeter and PLC logic. This app offers 17 random electrical problems for a challenging learning experience, allowing you to practice identifying issues in motor starters and control circuits.

Highlights
  • 17 random electrical problems
  • Virtual voltmeter with probes
  • Animated motor starter
  • Switch between schematic and PLC logic
  • Troubleshooting Assistant
  • Normal and troubleshooting modes
Features
Read full description

Totally FREE! No ads or pop-ups! How this App Works: This app has 17 different electrical problems that are randomly selected to provide a fun and challenging learning experience. It is certain to help you become more proficient in troubleshooting with a voltmeter. The motor starter is animated so that you can SEE the different contact configurations between forward and reverse. Another unique feature of this app is the ability to instantly switch back and forth between the control schematic and the real time PLC logic. There is also a "Troubleshooting Assistant" to help test the control circuit and find the problems. The app is initially in normal mode. This allows you to experience: - How a reversing starter works. - How to use the virtual voltmeter probes to measure voltages at various test points (small black squares, which turn red when the voltmeter makes contact with them) in the control circuit. - Analyze the PLC logic, when the starter is in various control modes Run (FWD & Rev), Off and Auto (FWD & REV). The HMI only has control in Auto. The selector switches work as indicated by control circuit. After the you understand how the motor starter works in the various control modes, you can check your troubleshooting skills by going to "Settings" (touch the 'More' button (at the top of the app) and then the gear icon) and selecting troubleshooting mode. Touch the "Arrow Back" icon to return to the control schematic. You will notice that the screen background has turned a light green, indicating that it is in troubleshooting mode and has a problem that needs to be found. Use the "Troubleshooting assistant" at the top, right side of the control schematic to help set the operator switches for testing. Use the voltmeter probes and PLC logic screen to identify the problem. Once you believe that you have identified the problem, touch "Problem Identified" button at the top of the app. A list of possible problems will appear. If you cannot determine the problem, at the bottom of the list, there is an item to provide the answer. If you desire to put the control system back in to normal (Non Troubleshooting Mode - No electrical problems) to learn more about how it is suppose to work, go to the settings section and unselect "Troubleshooting Mode". It is truly a great learning tool for anybody that wants to be able to fully utilize a voltmeter to troubleshoot a control circuit.

About

Avionics Pro

This educational tool provides essential calculators and circuit previews for aspiring Aircraft Electronics Technicians. It covers fundamental concepts like impedance, resonance, filters, and transistor bias, with real-world circuit examples tested in simulation and lab environments.

Highlights
  • Impedance calculators (Series/Parallel LRC)
  • Resonance calculators
  • Filter circuit analysis with frequency response
  • Time constant calculations (RL/RC)
  • Transistor bias simulation
  • Oscillator circuit examples
Features
Read full description

Avionics Pro contains virtually every tool needed to quickly solve homework problems and preview electronic lab experiments for the student who is completing a course of study to become an Aircraft Electronics Technician (AET). Specifically, it emphasizes Introductory Aircraft Avionics, featuring real world circuits that have been tested using an industry standard circuit simulator (Multisim) as well as in an actual electronics lab environment. Beyond the AET course, Avionics Pro is a handy refresher for graduate technicians in the industry as well as students looking to expand their understanding through higher education engineering courses. Avionics Pro features graphics support for all standard Apple phones and iPads. SECTIONS: - IMPEDANCE -- Series LRC -- Parallel LRC - RESONANCE -- Series LRC -- Parallel LRC -- Missing Component Calculator - FILTERS (Includes circuits and frequency response graphic) -- Low Pass (RC & RL) -- High Pass (RC & RL) -- Band Pass (RC) -- Band Reject (RC) -- Band Pass (Series Resonant) -- Band Reject (Parallel Resonant) - TIME CONSTANTS -- RL/RC Charging/Discharging - TRANSISTOR BIAS -- 2N222 (Bipolar Junction Transistor) - OSCILLATORS -- Colpitts -- Hartley DISCLAIMER The user of Avionics Pro for any specific application without an independent verification of its accuracy does so at his/her own risk and assumes any and all liability resulting from such use. No warranty is offered as to the accuracy of results. Users should have a thorough understanding of the relevant theoretical criteria.

Screenshots

Electrical Troubleshooting MS4 screens
Avionics Pro4 screens

Verdict

The call

The clearest difference is update cadence: Electrical Troubleshooting MS at weekly against Avionics Pro's every 5 months. Electrical Troubleshooting MS also leads on ratings volume (118 vs 2) and iOS requirement (13.0 vs 16.0). Avionics Pro's advantage is rating (5.0 vs 4.8) and review sentiment (100% vs 88%). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Avionics Pro holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Electrical Troubleshooting MS has 118 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 88% of Electrical Troubleshooting MS's written reviews are positive against 100% of Avionics Pro's.

UpkeepUpdate frequency

Electrical Troubleshooting MS ships an update weekly, Avionics Pro every 5 months. Both last shipped on October 7, 2026.

Scorecard5 real differences · 5 level
Electrical Troubleshooting MS versus Avionics Pro: the parameters behind the verdict, then further details
ParameterElectrical Troubleshooting MSAvionics Pro
PriceFreeFree
Rating4.8 (118 ratings)5.0 (2 ratings) — better
Positive reviews88.2% of reviews100.0% of reviews — better
Number of ratings118 — better2
Update frequencyWeekly — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size22 MB17 MB
Age rating4+4+
DeveloperDavid WhiteNeil Rohan

Customer experience

Electrical Troubleshooting MS

All ratings118 ratings
Positive95.8%
Neutral1.7%
Negative2.5%
Written reviews17 reviews
Positive88.2%
Neutral0.0%
Negative11.8%

Avionics Pro

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Electrical Troubleshooting MS

No in-app purchases

None

Avionics Pro

No in-app purchases

Questions

Is Electrical Troubleshooting MS free?
Electrical Troubleshooting MS is free to download, with no in-app purchases.
Is Avionics Pro free?
Avionics Pro is free to download, with no in-app purchases.
Which has better reviews, Electrical Troubleshooting MS or Avionics Pro?
Avionics Pro is rated higher. Electrical Troubleshooting MS averages 4.8 out of 5 from 118 ratings, while Avionics Pro averages 5.0 from 2 ratings.
Do Electrical Troubleshooting MS or Avionics Pro have ads?
Neither Electrical Troubleshooting MS nor Avionics Pro shows ads.
Which is updated more often, Electrical Troubleshooting MS or Avionics Pro?
Electrical Troubleshooting MS ships an update weekly, and Avionics Pro every 5 months. Most recently, Electrical Troubleshooting MS was updated on October 7, 2026 and Avionics Pro on October 7, 2026.

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