# Fault Current Calculator vs SCR MAXFLO™

The clearest difference is rating: SCR MAXFLO™ at 4.6 against Fault Current Calculator's 3.1. SCR MAXFLO™ also leads on in-app purchases (none vs 2). Fault Current Calculator's advantage is update cadence (every 4 months vs every 11 months) and ratings volume (23 vs 5). On price and ads there is nothing between them.

Both are free to download. Fault Current Calculator sells 2 in-app purchases, starting at $4.99 per month. SCR MAXFLO™ asks for nothing beyond the download.

SCR MAXFLO™ holds the better App Store score, 4.6 against 3.1. Both are backed by a comparable volume of ratings — 23 and 5 respectively.

Fault Current Calculator ships an update every 4 months, SCR MAXFLO™ every 11 months. The most recent releases landed on October 2, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Fault Current Calculator | SCR MAXFLO™ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (23 ratings)](https://appshunter.io/ios/app/fault-current-calculator/id647477910/reviews) | **[4.6 (5 ratings)](https://appshunter.io/ios/app/scr-maxflo/id1077499630/reviews)** |
| Number of ratings | **23** | 5 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 11 months |
| Monetization | Freemium | **Free** |
| Size | 25 MB | 7 MB |
| Requires iOS | **14.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| 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 |


### SCR MAXFLO™

[App page](https://appshunter.io/ios/app/scr-maxflo/id1077499630)

This app calculates pressure drop, fluid velocity, Reynold's number, and friction factor for liquids and gases. It allows users to create custom projects, manage pipes, fluids, and fittings, and supports both metric and imperial units for efficient on-site work.

**Highlights:** Pressure drop calculation, Fluid velocity calculation, Reynold's number calculation, Friction factor calculation, Custom project creation, Pipe, fluid, and fitting management, Metric and imperial unit support

**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 SCR MAXFLO™ free?

SCR MAXFLO™ is free to download, with no in-app purchases.

### Which has better reviews, Fault Current Calculator or SCR MAXFLO™?

SCR MAXFLO™ is rated higher. Fault Current Calculator averages 3.1 out of 5 from 23 ratings, while SCR MAXFLO™ averages 4.6 from 5 ratings.

### Do Fault Current Calculator or SCR MAXFLO™ have ads?

Neither Fault Current Calculator nor SCR MAXFLO™ shows ads.

### Which is updated more often, Fault Current Calculator or SCR MAXFLO™?

Fault Current Calculator ships an update every 4 months, and SCR MAXFLO™ every 11 months. Most recently, Fault Current Calculator was updated on October 2, 2026 and SCR MAXFLO™ on September 28, 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.*