Comparison

Electrical Troubleshooting MS vs Digital Electronics 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

Digital Electronics Pro

Features
Read full description

Digital Electronics Pro is a powerful reference tool for electronics students, engineers, and hobbyists. Whether you're just starting out or already experienced, this app helps you design, learn, and prototype with ease. It combines essential theory with practical guides and covers key digital electronics topics, including logic gates, counters, flip-flops, and IC reference data. The app also features detailed information on popular digital IC families such as TTL 7400 and CMOS 4000 series. Perfect for quick learning or as a companion for working on electronic circuits and digital systems. Available in 14 Languages: • English, French, German, Indonesian, Italian, Japanese, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Turkish, Ukrainian, and Vietnamese — study in your native language! The Pro version offers additional features, including: • Favourites feature: Allows users to save topics and access them quickly. • Full-text search: Enables quick navigation across all app content. The app includes detailed tutorials and references for: • Basic logic • Families of digital chips • Universal logic elements • Elements with Schmitt trigger • Buffer elements • Flip-flops • Registers • Counters • Adders • Multiplexers • Decoders and demultiplexers • 7-segment LED drivers • Encryptors • Digital comparators • 7400 series ICs • 4000 series ICs • Astable CMOS Oscillators • Monostable CMOS Oscillators • Bistable CMOS Oscillators • Gated CMOS Oscillators • TTL Oscillators Whether you're learning, teaching, or building real-world digital circuits, Digital Electronics Pro is your trusted companion every step of the way.

Screenshots

Electrical Troubleshooting MS4 screens
Digital Electronics Pro4 screens

Verdict

The call

The clearest difference is price: Electrical Troubleshooting MS at Free against Digital Electronics Pro's $4.99. Electrical Troubleshooting MS also leads on update cadence (weekly vs every 2 months) and iOS requirement (13.0 vs 16.0). 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

Electrical Troubleshooting MS is free to download; Digital Electronics Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Electrical Troubleshooting MS ships an update weekly, Digital Electronics Pro every 2 months. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.

Scorecard3 real differences · 7 level
Electrical Troubleshooting MS versus Digital Electronics Pro: the parameters behind the verdict, then further details
ParameterElectrical Troubleshooting MSDigital Electronics Pro
PriceFree — better$4.99
Rating4.8 (118 ratings) — better—
Positive reviews88.2% of reviews—
Number of ratings118 — better—
Update frequencyWeekly — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS13.0 — better16.0
Further details — not scored
Size22 MB21 MB
Age rating4+4+
DeveloperDavid WhiteALG Software Lab SIA

In-app purchases

None

Electrical Troubleshooting MS

No in-app purchases

None

Digital Electronics Pro

No in-app purchases

Questions

Is Electrical Troubleshooting MS free?
Electrical Troubleshooting MS is free to download, with no in-app purchases.
Is Digital Electronics Pro free?
Digital Electronics Pro costs $4.99, with no in-app purchases.
Do Electrical Troubleshooting MS or Digital Electronics Pro have ads?
Neither Electrical Troubleshooting MS nor Digital Electronics Pro shows ads.
Which is updated more often, Electrical Troubleshooting MS or Digital Electronics Pro?
Electrical Troubleshooting MS ships an update weekly, and Digital Electronics Pro every 2 months. Most recently, Electrical Troubleshooting MS was updated on October 7, 2026 and Digital Electronics Pro on October 12, 2026.

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