# Fault Current Calculator vs Master Lock® cLOTO™ Manager

The clearest difference is rating: Master Lock® cLOTO™ Manager at 5.0 against Fault Current Calculator's 3.0. Master Lock® cLOTO™ Manager also leads on in-app purchases (none vs 2). Fault Current Calculator's advantage is ratings volume (27 vs 3) and iOS requirement (14.0 vs 17.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Fault Current Calculator sells 2 in-app purchases, starting at $4.99 per month. Master Lock® cLOTO™ Manager asks for nothing beyond the download.

Master Lock® cLOTO™ Manager holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Fault Current Calculator has 27 ratings behind it against 3, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 23, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Fault Current Calculator | Master Lock® cLOTO™ Manager |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (27 ratings)](https://appshunter.io/ios/app/fault-current-calculator/id647477910/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/master-lock-cloto-manager/id6503617465/reviews)** |
| Number of ratings | **27** | 3 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Freemium | **Free** |
| Size | 25 MB | 17 MB |
| Requires iOS | **14.0** | 17.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Cooper Bussmann, LLC](https://appshunter.io/developer/609315535) | [Master Lock Company, LLC.](https://appshunter.io/developer/417488857) |

## What reviewers say

### Fault Current Calculator

[App page](https://appshunter.io/ios/app/fault-current-calculator/id647477910)

This tool helps contractors, engineers, and electricians quickly calculate available fault current on single and three-phase electrical systems. It also assists in sizing fuses and conductors for various circuits and can generate labels for service equipment.

**Highlights:** Calculate available fault current, Size fuses and conductors, Generate service equipment labels, Single and three-phase system support, NEC® 110.24 compliance

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly Subscription | $4.99 | per month |
| Pro Annual Subscription | $39.99 | per year |


### Master Lock® cLOTO™ Manager

[App page](https://appshunter.io/ios/app/master-lock-cloto-manager/id6503617465)

Digitally transform workplace safety with a connected lockout tagout solution. Streamline processes, assign and track procedures, and gain full traceability for enhanced accountability and efficiency.

**Highlights:** Digital procedure workflows, Assign and track procedures, Full traceability of procedure data, Real-time decision making, On-demand metrics for optimization, Digital tagging and hardware scanning

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fault Current Calculator free?

Fault Current Calculator is free to download, with in-app purchases available.

### Is Master Lock® cLOTO™ Manager free?

Master Lock® cLOTO™ Manager is free to download, with no in-app purchases.

### Which has better reviews, Fault Current Calculator or Master Lock® cLOTO™ Manager?

Master Lock® cLOTO™ Manager is rated higher. Fault Current Calculator averages 3.0 out of 5 from 27 ratings, while Master Lock® cLOTO™ Manager averages 5.0 from 3 ratings.

### Do Fault Current Calculator or Master Lock® cLOTO™ Manager have ads?

Neither Fault Current Calculator nor Master Lock® cLOTO™ Manager shows ads.

### Which is updated more often, Fault Current Calculator or Master Lock® cLOTO™ Manager?

Fault Current Calculator ships an update every 4 months, and Master Lock® cLOTO™ Manager every 4 months. Most recently, Fault Current Calculator was updated on October 23, 2026 and Master Lock® cLOTO™ Manager on October 7, 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.*