Fault Current Calculator vs MApp™
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
MApp™
This utility app connects to specific Bluetooth-enabled multi-meters, allowing users to safely record, graph, and document electrical measurements from a distance. It enables the creation of customized reports with notes, pictures, and GPS locations, which can then be emailed.
- Bluetooth connectivity with multi-meters
- Remote measurement recording
- Data graphing and analysis
- Customizable reports with notes and pictures
- GPS location tagging
- Email report generation
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Southwire’s new MApp™ mobile app works with our new Bluetooth® enabled 15190T MaintenancePRO™ multi-meter and 23090T MaintenancePRO™ clamp meter. This system is like having an electrician’s helper with you at all times. Not only does the app allow you to safely stand back from hazardous situations like arc flash, it also provides you with one of the most powerful documentation tools you will ever need. The app lets you record and graph measured values, set high or low alarms, attach notes, pictures, and even a GPS location to your measurements. You can choose to use any combination of these features to customize a complete report about your job and email it back to the office with the press of a button.
Screenshots
Verdict
The clearest difference is review sentiment: MApp™ at 50% against Fault Current Calculator's 0%. MApp™ also leads on in-app purchases (none vs 2) and rating (3.5 vs 3.1). Fault Current Calculator's advantage is update cadence (every 4 months vs every 56 months) and ratings volume (23 vs 6). On price, ads, device support and iOS requirement 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. MApp™ asks for nothing beyond the download.
MApp™ holds the better App Store score, 3.5 against 3.1. Both are backed by a comparable volume of ratings — 23 and 6 respectively. Written reviews point the same way: 0% of Fault Current Calculator's written reviews are positive against 50% of MApp™'s.
Fault Current Calculator ships an update every 4 months, MApp™ every 56 months. The most recent releases landed on October 20, 2026 and October 15, 2026 respectively.
| Parameter | Fault Current Calculator | MApp™ |
|---|---|---|
| Price | Free | Free |
| Rating | 3.1 (23 ratings) | 3.5 (6 ratings) — better |
| Positive reviews | 0.0% of reviews | 50.0% of reviews — better |
| Number of ratings | 23 — better | 6 |
| Update frequency | Every 4 months — better | Every 56 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 | 15.6 |
| Further details — not scored | ||
| Size | 25 MB | 10 MB |
| Age rating | 17+ | 4+ |
| Developer | Cooper Bussmann, LLC | Southwire Company |
Customer experience
Fault Current Calculator
MApp™
In-app purchases
Fault Current Calculator
- Pro Monthly Subscription7 Days trial$4.991 Month
- Pro Annual Subscription7 Days trial$39.991 Year
MApp™
No in-app purchases
Questions
Is Fault Current Calculator free?
Is MApp™ free?
Which has better reviews, Fault Current Calculator or MApp™?
Do Fault Current Calculator or MApp™ have ads?
Which is updated more often, Fault Current Calculator or MApp™?
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