Comparison

Contractors License Exam Prep vs Electrical Troubleshooting MS

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

Head to head
About

Contractors License Exam Prep

Prepare for your California contractors license exam with practice tests, instructional videos, and an application review system. Upload your completed application for expert feedback and corrections.

Highlights
  • Practice Exams
  • Application Videos
  • Video Course
  • Audio Course
  • Application Review System
  • Student Account Access
Features
Read full description

This app is for students of Contractors Intelligence School. It is available for currently enrolled students. This app helps students get prepared for their California contractors license exam. The app contains access to the following tools: Practice Exams Application Videos Video Course Audio Course Resources Application Review System Student's Account This app allows users to watch instructional videos for application help. These videos will walk the user through the California contractors license application process. The user is then able to take a picture of the completed application and upload it into their account for Contractors Intelligence School staff to review the application and give suggested corrections. These corrections can also be viewed through the user's account. This app allows users to take Practice Exams. The app remembers users, therefore it is not necessary for the user to re-login every single time. So, if the user has only few minutes to study, this app allows him or her to take practice exams without wasting time. This app is exclusively available through Contractors Intelligence School and requires the user to have an existing account.

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.

Screenshots

Contractors License Exam Prep4 screens
Electrical Troubleshooting MS4 screens

Verdict

The call

The clearest difference is in-app purchases: Electrical Troubleshooting MS at none against Contractors License Exam Prep's 2. Electrical Troubleshooting MS also leads on update cadence (weekly vs every 5 weeks) and iOS requirement (13.0 vs 15.1). Contractors License Exam Prep's advantage is ratings volume (787 vs 122). On price, rating, review sentiment and ads 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. Contractors License Exam Prep sells 2 one-off in-app purchases. Electrical Troubleshooting MS asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Contractors License Exam Prep against 4.8 for Electrical Troubleshooting MS. That said, the two scores are not equally well evidenced: Contractors License Exam Prep has 787 ratings behind it against 122, so its average is the more settled of the two. Written reviews are what separate them: 85% of Contractors License Exam Prep's written reviews are positive against 88% of Electrical Troubleshooting MS's.

UpkeepUpdate frequency

Contractors License Exam Prep ships an update every 5 weeks, Electrical Troubleshooting MS weekly. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard5 real differences · 5 level
Contractors License Exam Prep versus Electrical Troubleshooting MS: the parameters behind the verdict, then further details
ParameterContractors License Exam PrepElectrical Troubleshooting MS
PriceFreeFree
Rating4.8 (787 ratings)4.8 (122 ratings) — better
Positive reviews84.6% of reviews88.2% of reviews — better
Number of ratings787 — better122
Update frequencyEvery 5 weeksWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.113.0 — better
Further details — not scored
Size35 MB22 MB
Age rating4+4+
DeveloperContractors Intelligence School, Inc.David White

Customer experience

Contractors License Exam Prep

All ratings786 ratings
Positive94.7%
Neutral1.5%
Negative3.8%
Written reviews91 reviews
Positive84.6%
Neutral5.5%
Negative9.9%

Electrical Troubleshooting MS

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

Bugs and requests

Contractors License Exam Prep

Reported bugs

3 issues
  • Login issues and lost progress
  • Compatibility problems on older devices
  • Playback errors in audio courses

Requested features

4 requests
  • Landscape mode support
  • Offline access to study materials
  • More trade-specific practice questions
  • Improved math and calculation tools

Electrical Troubleshooting MS

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Contractors License Exam Prep

One-time2
  • 30-Days Law & Business Course$149.99
  • 30-Days Trade Course$149.99
None

Electrical Troubleshooting MS

No in-app purchases

Questions

Is Contractors License Exam Prep free?
Contractors License Exam Prep is free to download, with in-app purchases available.
Is Electrical Troubleshooting MS free?
Electrical Troubleshooting MS is free to download, with no in-app purchases.
Which has better reviews, Contractors License Exam Prep or Electrical Troubleshooting MS?
Electrical Troubleshooting MS is rated higher. Contractors License Exam Prep averages 4.8 out of 5 from 787 ratings, while Electrical Troubleshooting MS averages 4.8 from 122 ratings.
Do Contractors License Exam Prep or Electrical Troubleshooting MS have ads?
Neither Contractors License Exam Prep nor Electrical Troubleshooting MS shows ads.
Which is updated more often, Contractors License Exam Prep or Electrical Troubleshooting MS?
Contractors License Exam Prep ships an update every 5 weeks, and Electrical Troubleshooting MS weekly. Most recently, Contractors License Exam Prep was updated on November 1, 2026 and Electrical Troubleshooting MS on November 3, 2026.

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