Comparison

Fault Current Calculator vs Ferret Tools

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

Ferret Tools

View and record live video from your inspection camera. This app allows you to capture photos and videos of hard-to-reach areas. Requires a separate Ferret inspection camera to function.

Highlights
  • Live video streaming
  • Photo capture
  • Video recording
  • Inspection camera control
Read full description

A Ferret inspection camera is required to use this App – sold separately. Need help? Please visit ferrettools.com/support

Screenshots

Fault Current Calculator4 screens
Ferret Tools4 screens

Verdict

The call

The clearest difference is in-app purchases: Ferret Tools at none against Fault Current Calculator's 2. Ferret Tools also leads on review sentiment (27% vs 0%) and update cadence (every 6 weeks vs every 4 months). On price, rating, ratings volume and ads 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. Ferret Tools asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 3.1 for Fault Current Calculator against 3.0 for Ferret Tools. Both are backed by a comparable volume of ratings — 23 and 22 respectively. Written reviews are what separate them: 0% of Fault Current Calculator's written reviews are positive against 27% of Ferret Tools's.

UpkeepUpdate frequency

Fault Current Calculator ships an update every 4 months, Ferret Tools every 6 weeks. The most recent releases landed on August 20, 2026 and June 10, 2026 respectively.

Scorecard5 real differences · 5 level
Fault Current Calculator versus Ferret Tools: the parameters behind the verdict, then further details
ParameterFault Current CalculatorFerret Tools
PriceFreeFree
Rating3.1 (23 ratings) — better3.0 (22 ratings)
Positive reviews0.0% of reviews26.9% of reviews — better
Number of ratings23 — better22
Update frequencyEvery 4 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.09.0 — better
Further details — not scored
Size25 MB31 MB
Age rating17+4+
DeveloperCooper Bussmann, LLCThe Cable Ferret Company Limited

Customer experience

Fault Current Calculator

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

Ferret Tools

All ratings20 ratings
Positive45.0%
Neutral10.0%
Negative45.0%
Written reviews26 reviews
Positive26.9%
Neutral3.8%
Negative69.2%

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

Ferret Tools

No in-app purchases

Questions

Is Fault Current Calculator free?
Fault Current Calculator is free to download, with in-app purchases available.
Is Ferret Tools free?
Ferret Tools is free to download, with no in-app purchases.
Which has better reviews, Fault Current Calculator or Ferret Tools?
Fault Current Calculator is rated higher. Fault Current Calculator averages 3.1 out of 5 from 23 ratings, while Ferret Tools averages 3.0 from 22 ratings.
Do Fault Current Calculator or Ferret Tools have ads?
Neither Fault Current Calculator nor Ferret Tools shows ads.
Which is updated more often, Fault Current Calculator or Ferret Tools?
Fault Current Calculator ships an update every 4 months, and Ferret Tools every 6 weeks. Most recently, Fault Current Calculator was updated on August 20, 2026 and Ferret Tools on June 10, 2026.

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