# Fault Current Calculator (PFC) vs Moon's Barber Shop

The clearest difference is ads: Moon's Barber Shop at none against Fault Current Calculator (PFC)'s shown. Fault Current Calculator (PFC)'s advantage is update cadence (every 14 months vs every 41 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Fault Current Calculator (PFC) ships an update every 14 months, Moon's Barber Shop every 41 months. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Fault Current Calculator (PFC) | Moon's Barber Shop |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/fault-current-calculator-pfc/id577611194/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 14 months** | Every 41 months |
| Monetization | Paid | — |
| Size | 10 MB | 2 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pro Certs Software Ltd](https://appshunter.io/developer/444429696) | [Scott Treacy](https://appshunter.io/developer/1459493413) |

## What reviewers say

### Fault Current Calculator (PFC)

[App page](https://appshunter.io/ios/app/fault-current-calculator-pfc/id577611194)

This app calculates prospective fault current (PFC) in kA and Amps for single and three-phase circuits. It allows users to input any two values (voltage, earth loop impedance, or PFC) to determine the third, aiding in selecting appropriate circuit breaker ratings.

**Highlights:** Calculate PFC from Zs/Ze and Voltage, Calculate Zs/Ze from Voltage and PFC, Calculate Voltage from PFC and Zs/Ze, PFC calculation in kA and Amps, Single and three-phase support, Input any two values to calculate the third

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Moon's Barber Shop

[App page](https://appshunter.io/ios/app/moons-barber-shop/id1459493414)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fault Current Calculator (PFC) free?

Fault Current Calculator (PFC) is free to download, with no in-app purchases.

### Is Moon's Barber Shop free?

Moon's Barber Shop is free to download, with no in-app purchases.

### Do Fault Current Calculator (PFC) or Moon's Barber Shop have ads?

Fault Current Calculator (PFC) shows ads; Moon's Barber Shop does not.

### Which is updated more often, Fault Current Calculator (PFC) or Moon's Barber Shop?

Fault Current Calculator (PFC) ships an update every 14 months, and Moon's Barber Shop every 41 months. Most recently, Fault Current Calculator (PFC) was updated on November 1, 2026 and Moon's Barber Shop on October 29, 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.*