Comparison

Fault Current Calculator vs CMC Swift

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

CMC Swift

Control Omicron CMCs to output analog voltages and currents, feed in binary signals, or measure them. Perform wiring and control system checks, as well as trip tests for protective functions quickly and easily. It also facilitates polarity checks when used with a handheld CPOL device.

Highlights
  • Output analog voltages and currents
  • Feed in binary signals
  • Measure binary signals
  • Perform wiring and control system checks
  • Conduct trip tests for protective functions
  • Perform polarity checks with CPOL device
Features
Read full description

For more information how to get started, visit https://www.omicronenergy.com/cmcswift With CMC Swift you can output analog voltages and currents via your CMC, feed in binary signals or measure them. Wiring and control system checks as well as pickup and trip tests of protective functions, such as overcurrent protection, can be performed quickly and easily. In combination with a handheld CPOL device, polarity checks can be easily performed.

Screenshots

Fault Current Calculator4 screens
CMC Swift4 screens

Verdict

The call

The clearest difference is rating: CMC Swift at 5.0 against Fault Current Calculator's 3.1. CMC Swift also leads on in-app purchases (none vs 2). Fault Current Calculator's advantage is ratings volume (23 vs 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. CMC Swift asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

CMC Swift holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: Fault Current Calculator has 23 ratings behind it against 1, 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 August 20, 2026 and July 5, 2026 respectively.

Scorecard4 real differences · 6 level
Fault Current Calculator versus CMC Swift: the parameters behind the verdict, then further details
ParameterFault Current CalculatorCMC Swift
PriceFreeFree
Rating3.1 (23 ratings)5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings23 — better1
Update frequencyEvery 4 monthsEvery 4 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better15.0
Further details — not scored
Size25 MB127 MB
Age rating17+4+
DeveloperCooper Bussmann, LLCOMICRON electronics GmbH

Customer experience

Fault Current Calculator

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

CMC Swift

All ratings1 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

CMC Swift

No in-app purchases

Questions

Is Fault Current Calculator free?
Fault Current Calculator is free to download, with in-app purchases available.
Is CMC Swift free?
CMC Swift is free to download, with no in-app purchases.
Which has better reviews, Fault Current Calculator or CMC Swift?
CMC Swift is rated higher. Fault Current Calculator averages 3.1 out of 5 from 23 ratings, while CMC Swift averages 5.0 from 1 ratings.
Do Fault Current Calculator or CMC Swift have ads?
Neither Fault Current Calculator nor CMC Swift shows ads.
Which is updated more often, Fault Current Calculator or CMC Swift?
Fault Current Calculator ships an update every 4 months, and CMC Swift every 4 months. Most recently, Fault Current Calculator was updated on August 20, 2026 and CMC Swift on July 5, 2026.

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