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.
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.
- Calculate available fault current
- Size fuses and conductors
- Generate service equipment labels
- Single and three-phase system support
- NEC® 110.24 compliance
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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
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.
- 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
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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
Verdict
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
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.
| Parameter | Fault Current Calculator | Master Lock® cLOTO™ Manager |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (27 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 27 — better | 3 |
| Update frequency | Every 4 months | Every 4 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 14.0 — better | 17.1 |
| Further details — not scored | ||
| Size | 25 MB | 17 MB |
| Age rating | 17+ | 4+ |
| Developer | Cooper Bussmann, LLC | Master Lock Company, LLC. |
Customer experience
Fault Current Calculator
Master Lock® cLOTO™ Manager
In-app purchases
Fault Current Calculator
- Pro Monthly Subscription7 Days trial$4.991 Month
- Pro Annual Subscription7 Days trial$39.991 Year
Master Lock® cLOTO™ Manager
No in-app purchases
Questions
Is Fault Current Calculator free?
Is Master Lock® cLOTO™ Manager free?
Which has better reviews, Fault Current Calculator or Master Lock® cLOTO™ Manager?
Do Fault Current Calculator or Master Lock® cLOTO™ Manager have ads?
Which is updated more often, Fault Current Calculator or Master Lock® cLOTO™ Manager?
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