# Electrical Troubleshooting MS vs Contractor Success School

The clearest difference is update cadence: Contractor Success School at every 3 days against Electrical Troubleshooting MS's weekly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Electrical Troubleshooting MS ships an update weekly, Contractor Success School every 3 days. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Electrical Troubleshooting MS | Contractor Success School |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (122 ratings)](https://appshunter.io/ios/app/electrical-troubleshooting-ms/id1562565451/reviews)** | — |
| Number of ratings | **122** | — |
| Positive reviews | 88.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Free | — |
| Size | 22 MB | 19 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [David White](https://appshunter.io/developer/911163945) | [Contractor Success School](https://appshunter.io/developer/1883934430) |

## What reviewers say

### Electrical Troubleshooting MS

[App page](https://appshunter.io/ios/app/electrical-troubleshooting-ms/id1562565451)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Contractor Success School

[App page](https://appshunter.io/ios/app/contractor-success-school/id6760331645)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Electrical Troubleshooting MS free?

Electrical Troubleshooting MS is free to download, with no in-app purchases.

### Is Contractor Success School free?

Contractor Success School is free to download, with no in-app purchases.

### Do Electrical Troubleshooting MS or Contractor Success School have ads?

Neither Electrical Troubleshooting MS nor Contractor Success School shows ads.

### Which is updated more often, Electrical Troubleshooting MS or Contractor Success School?

Electrical Troubleshooting MS ships an update weekly, and Contractor Success School every 3 days. Most recently, Electrical Troubleshooting MS was updated on October 30, 2026 and Contractor Success School on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*