# Fault Current Calculator vs MApp™

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.

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.

## The numbers

| Metric | Fault Current Calculator | MApp™ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (23 ratings)](https://appshunter.io/ios/app/fault-current-calculator/id647477910/reviews) | **[3.5 (6 ratings)](https://appshunter.io/ios/app/mapp/id1038053728/reviews)** |
| Number of ratings | **23** | 6 |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 56 months |
| Monetization | Freemium | **Free** |
| Size | 25 MB | 10 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Cooper Bussmann, LLC](https://appshunter.io/developer/609315535) | [Southwire Company](https://appshunter.io/developer/440338423) |

## What reviewers say

### Fault Current Calculator

[App page](https://appshunter.io/ios/app/fault-current-calculator/id647477910)

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:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly Subscription | $4.99 | per month |
| Pro Annual Subscription | $39.99 | per year |


### MApp™

[App page](https://appshunter.io/ios/app/mapp/id1038053728)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*