Fault Current Calculator vs Ferret Tools
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
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.
- Live video streaming
- Photo capture
- Video recording
- Inspection camera control
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A Ferret inspection camera is required to use this App – sold separately. Need help? Please visit ferrettools.com/support
Screenshots
Verdict
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
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.
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.
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.
| Parameter | Fault Current Calculator | Ferret Tools |
|---|---|---|
| Price | Free | Free |
| Rating | 3.1 (23 ratings) — better | 3.0 (22 ratings) |
| Positive reviews | 0.0% of reviews | 26.9% of reviews — better |
| Number of ratings | 23 — better | 22 |
| Update frequency | Every 4 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 25 MB | 31 MB |
| Age rating | 17+ | 4+ |
| Developer | Cooper Bussmann, LLC | The Cable Ferret Company Limited |
Customer experience
Fault Current Calculator
Ferret Tools
In-app purchases
Fault Current Calculator
- Pro Monthly Subscription7 Days trial$4.991 Month
- Pro Annual Subscription7 Days trial$39.991 Year
Ferret Tools
No in-app purchases
Questions
Is Fault Current Calculator free?
Is Ferret Tools free?
Which has better reviews, Fault Current Calculator or Ferret Tools?
Do Fault Current Calculator or Ferret Tools have ads?
Which is updated more often, Fault Current Calculator or Ferret Tools?
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