Comparison

Electrical Troubleshooting MS vs Impedance Calculators

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

Impedance Calculators

This app provides 8 calculators for electrical impedance calculations. It covers various combinations of resistors, inductors, and capacitors in series and parallel circuits, offering formulas and circuit diagrams.

Highlights
  • Series impedance calculator
  • Parallel impedance calculator
  • R, L, & C circuit calculations
  • Includes formulas
  • Circuit diagrams provided
  • 8 distinct calculators
Features
Read full description

Impedance Calculators is a pack of 8 calculators with circuits and formulas. 
• Impedance of Resistor and Inductor in series 
• Impedance of Resistor and Inductor in parallel 
• Impedance of Resistor and Conductor in series 
• Impedance of Resistor and Conductor in parallel 
• Impedance of Inductor and Conductor in series 
• Impedance of Inductor and Conductor in parallel 
• Impedance of R, L & C in series 
• Impedance of R, L & C in parallel.

Screenshots

Electrical Troubleshooting MS4 screens
Impedance Calculators4 screens

Verdict

The call

The clearest difference is in-app purchases: Electrical Troubleshooting MS at none against Impedance Calculators's 1. Electrical Troubleshooting MS also leads on ads (none vs shown) and update cadence (weekly vs every 21 months). Impedance Calculators's advantage is rating (5.0 vs 4.8). On price 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

Both are free to download. Impedance Calculators sells 1 one-off in-app purchase. Electrical Troubleshooting MS asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Impedance Calculators 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 122 ratings behind it against 13, so its average is the more settled of the two.

UpkeepUpdate frequency

Electrical Troubleshooting MS ships an update weekly, Impedance Calculators every 21 months. Both last shipped on October 23, 2026.

Scorecard7 real differences · 3 level
Electrical Troubleshooting MS versus Impedance Calculators: the parameters behind the verdict, then further details
ParameterElectrical Troubleshooting MSImpedance Calculators
PriceFreeFree
Rating4.8 (122 ratings)5.0 (13 ratings) — better
Positive reviews88.2% of reviews—
Number of ratings122 — better13
Update frequencyWeekly — betterEvery 21 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size22 MB8 MB
Age rating4+4+
DeveloperDavid WhiteV PUGAZHENTHI

Customer experience

Electrical Troubleshooting MS

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

Impedance Calculators

All ratings12 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Electrical Troubleshooting MS

No in-app purchases

1 purchases

Impedance Calculators

One-time1
  • Remove Ads$0.99

Questions

Is Electrical Troubleshooting MS free?
Electrical Troubleshooting MS is free to download, with no in-app purchases.
Is Impedance Calculators free?
Impedance Calculators is free to download, with in-app purchases available.
Which has better reviews, Electrical Troubleshooting MS or Impedance Calculators?
Impedance Calculators is rated higher. Electrical Troubleshooting MS averages 4.8 out of 5 from 122 ratings, while Impedance Calculators averages 5.0 from 13 ratings.
Do Electrical Troubleshooting MS or Impedance Calculators have ads?
Impedance Calculators shows ads; Electrical Troubleshooting MS does not.
Which is updated more often, Electrical Troubleshooting MS or Impedance Calculators?
Electrical Troubleshooting MS ships an update weekly, and Impedance Calculators every 21 months. Most recently, Electrical Troubleshooting MS was updated on October 23, 2026 and Impedance Calculators on October 23, 2026.

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