Comparison

Fault Current Calculator vs MApp™

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

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.

Highlights
  • Bluetooth connectivity with multi-meters
  • Remote measurement recording
  • Data graphing and analysis
  • Customizable reports with notes and pictures
  • GPS location tagging
  • Email report generation
Features
Read full description

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

Fault Current Calculator4 screens
MApp™4 screens

Verdict

The call

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

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. MApp™ asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
Fault Current Calculator versus MApp™: the parameters behind the verdict, then further details
ParameterFault Current CalculatorMApp™
PriceFreeFree
Rating3.1 (23 ratings)3.5 (6 ratings) — better
Positive reviews0.0% of reviews50.0% of reviews — better
Number of ratings23 — better6
Update frequencyEvery 4 months — betterEvery 56 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS14.0 — better15.6
Further details — not scored
Size25 MB10 MB
Age rating17+4+
DeveloperCooper Bussmann, LLCSouthwire Company

Customer experience

Fault Current Calculator

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

MApp™

All ratings6 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

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

MApp™

No in-app purchases

Questions

Is Fault Current Calculator free?
Fault Current Calculator is free to download, with in-app purchases available.
Is MApp™ free?
MApp™ is free to download, with no in-app purchases.
Which has better reviews, Fault Current Calculator or MApp™?
MApp™ is rated higher. Fault Current Calculator averages 3.1 out of 5 from 23 ratings, while MApp™ averages 3.5 from 6 ratings.
Do Fault Current Calculator or MApp™ have ads?
Neither Fault Current Calculator nor MApp™ shows ads.
Which is updated more often, Fault Current Calculator or MApp™?
Fault Current Calculator ships an update every 4 months, and MApp™ every 56 months. Most recently, Fault Current Calculator was updated on October 20, 2026 and MApp™ on October 15, 2026.

Other comparisons