Comparison

Fault Current Calculator vs Master Lock® cLOTO™ Manager

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

Head to head
About

Fault Current Calculator

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
Read full description

Eaton's Bussmann Series FC2 Available Fault Current Calculator application is an innovative tool developed for contractors, engineers, electricians, and electrical inspectors. This tool can be used on the Bussmann website or out in the field on a mobile device for those needing a quick and simple way to determine available fault current. With this simple tool, users can: - Calculate available fault current on single and three-phase systems - Create and send a label via email for marking the available fault current on service equipment (NEC® 110.24) - Size fuses and conductors for service, feeder, and branch circuits. This application, calculations, and other information are intended to clearly present technical information that will determine the available fault current at specific points in an electrical system. Bussmann reserves the right, without notice, to change this application and/or discontinue/ limit its distribution and/or availability. Bussmann also reserves the right to change or update, without notice, any technical information contained in this application. The data and information presented in this application are believed to be accurate. However, any and all liability for the content, or any omissions from this application, including any inaccuracies, errors, or misstatements in such data, calculations or information, is expressly disclaimed. The application, calculations and other information are provided without warranty of any kind, either expressed or implied, but not limited to, the implied warranties of merchantability, or fitness for a particular purpose. Bussmann disclaims any liability for the use of this application, calculations or other information. The complete End-User License Agreement can be found at: https://faultcurrentcalculatorpro.bussmann.com/home/eula

About

Master Lock® cLOTO™ Manager

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
Read full description

We’re revolutionizing workplace safety. The Master Lock cLOTO™ (Connected Lockout Tagout) Solution enables you to digitally transform your program by bringing safety, accountability and innovation together on a desktop or mobile device. Streamline processes, assign and track procedures and make real-time decisions when they matter most. Get complete and connected control, all in one place. Full Traceability Track procedure data for full visibility of active and completed procedures, providing an added measure of accountability to your facility's lockout program. Increase Safety Improve safety by ensuring LOTO procedures are executed accurately and completely. Unlock Efficiency Access on-demand metrics of maintenance and LOTO tasks to quickly optimize processes. Drive increased efficiency by digitizing the audit trail. Access Support Our professional consultation services are here to support you 100% of the way with compliance assessments, trainings, written procedures and more. We’ve got you covered. The Master Lock® cLOTO™ Manager app is one of the core components of the complete Master Lock® cLOTO™ Solution. The Manager app helps to mitigate human error with digital procedure workflows you can take anywhere in the facility. Access step-by-step lockout instructions, track in-progress tasks and use the digital tagging function to scan hardware and instantly retrieve information on lock owner and assigned procedure.

Screenshots

Fault Current Calculator4 screens
Master Lock® cLOTO™ Manager4 screens

Verdict

The call

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.

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard5 real differences · 5 level
Fault Current Calculator versus Master Lock® cLOTO™ Manager: the parameters behind the verdict, then further details
ParameterFault Current CalculatorMaster Lock® cLOTO™ Manager
PriceFreeFree
Rating3.0 (27 ratings)5.0 (3 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings27 — better3
Update frequencyEvery 4 monthsEvery 4 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS14.0 — better17.1
Further details — not scored
Size25 MB17 MB
Age rating17+4+
DeveloperCooper Bussmann, LLCMaster Lock Company, LLC.

Customer experience

Fault Current Calculator

All ratings23 ratings
Positive47.8%
Neutral8.7%
Negative43.5%
Written reviews10 reviews
Positive0.0%
Neutral20.0%
Negative80.0%

Master Lock® cLOTO™ Manager

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Fault Current Calculator

Subscriptions2
  • Pro Monthly Subscription7 Days trial$4.991 Month
  • Pro Annual Subscription7 Days trial$39.991 Year
None

Master Lock® cLOTO™ Manager

No in-app purchases

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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