# Fault Current Calculator (PFC) vs RIENERGYFLOWR

The clearest difference is monetization model: RIENERGYFLOWR at free against Fault Current Calculator (PFC)'s paid. RIENERGYFLOWR also leads on ads (none vs shown) and update cadence (every 5 weeks vs every 14 months). Fault Current Calculator (PFC)'s advantage is review sentiment (33% vs 0%). 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, RIENERGYFLOWR every 5 weeks. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Fault Current Calculator (PFC) | RIENERGYFLOWR |
| --- | --- | --- |
| 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** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 14 months | **Every 5 weeks** |
| Monetization | Paid | **Free** |
| Size | 10 MB | 26 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pro Certs Software Ltd](https://appshunter.io/developer/444429696) | [无锡乐伏网络科技有限公司](https://appshunter.io/developer/1197246083) |

## 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


### RIENERGYFLOWR

[App page](https://appshunter.io/ios/app/rienergyflowr/id6446395462)

Monitor and control advanced energy storage systems, string inverters, and hybrid inverters. This application provides intelligent cloud-based software solutions for managing energy flow. It is designed for users of specific energy hardware.

**Highlights:** Monitor energy storage systems, Control string inverters, Manage hybrid inverters, Cloud-based software solutions, Intelligent energy flow management

**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 RIENERGYFLOWR free?

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

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

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

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

Fault Current Calculator (PFC) ships an update every 14 months, and RIENERGYFLOWR every 5 weeks. Most recently, Fault Current Calculator (PFC) was updated on October 24, 2026 and RIENERGYFLOWR on October 12, 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.*