# Fault Current Calculator (PFC) vs Electrical Certificate App

The clearest difference is in-app purchases: Fault Current Calculator (PFC) at none against Electrical Certificate App's 2. Electrical Certificate App's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 14 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Electrical Certificate App sells 2 in-app purchases, starting at $19.99 per month. Fault Current Calculator (PFC) asks for nothing beyond the download.

Fault Current Calculator (PFC) ships an update every 14 months, Electrical Certificate App every 2 weeks. The most recent releases landed on August 14, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Fault Current Calculator (PFC) | Electrical Certificate App |
| --- | --- | --- |
| 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** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 14 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 10 MB | 47 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pro Certs Software Ltd](https://appshunter.io/developer/444429696) | [Trade Apps LTD](https://appshunter.io/developer/1293890969) |

## 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


### Electrical Certificate App

[App page](https://appshunter.io/ios/app/electrical-certificate-app/id1531731405)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $19.99 | per month |
| yearly Subscription | $199.99 | per year |


## Frequently asked questions

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

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

### Is Electrical Certificate App free?

Electrical Certificate App is free to download, with in-app purchases available.

### Do Fault Current Calculator (PFC) or Electrical Certificate App have ads?

Fault Current Calculator (PFC) shows ads; Electrical Certificate App does not.

### Which is updated more often, Fault Current Calculator (PFC) or Electrical Certificate App?

Fault Current Calculator (PFC) ships an update every 14 months, and Electrical Certificate App every 2 weeks. Most recently, Fault Current Calculator (PFC) was updated on August 14, 2026 and Electrical Certificate App on September 8, 2026.

---

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