# Fault Current Calculator (PFC) vs Cableboss

The clearest difference is monetization model: Cableboss at free against Fault Current Calculator (PFC)'s paid. Cableboss also leads on ads (none vs shown) and update cadence (every 2 months vs every 14 months). On price, in-app purchases and device support 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, Cableboss every 2 months. The most recent releases landed on August 14, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Fault Current Calculator (PFC) | Cableboss |
| --- | --- | --- |
| 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 | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 14 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 10 MB | 131 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pro Certs Software Ltd](https://appshunter.io/developer/444429696) | [Cableboss Limited](https://appshunter.io/developer/1641458936) |

## 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


### Cableboss

[App page](https://appshunter.io/ios/app/cableboss/id1641458934)

This app helps electricians accurately position, log, and recover cable locations within construction sites. It streamlines the process of fitting lights, saving time and money by reducing unnecessary site visits.

**Highlights:** Accurate cable positioning, Log cable locations, Recover cables easily, Create site and room profiles, Add pictures and notes, Share cable information

**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 Cableboss free?

Cableboss is free to download, with no in-app purchases.

### Do Fault Current Calculator (PFC) or Cableboss have ads?

Fault Current Calculator (PFC) shows ads; Cableboss does not.

### Which is updated more often, Fault Current Calculator (PFC) or Cableboss?

Fault Current Calculator (PFC) ships an update every 14 months, and Cableboss every 2 months. Most recently, Fault Current Calculator (PFC) was updated on August 14, 2026 and Cableboss on September 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.*