# FläktGroup K Factor vs Regin

The clearest difference is iOS requirement: FläktGroup K Factor at 12.4 against Regin's 16. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 6 months. The most recent releases landed on June 5, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | FläktGroup K Factor | Regin |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | Every 6 months |
| Monetization | Free | — |
| Size | 22 MB | 6 MB |
| Requires iOS | **12.4** | 16 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FlaktGroup Sweden AB](https://appshunter.io/developer/508731755) | [AB Regin](https://appshunter.io/developer/1648456857) |

## What reviewers say

### FläktGroup K Factor

[App page](https://appshunter.io/ios/app/flaktgroup-k-factor/id508731752)

This utility app helps calculate airflow and pressure for various fan products. Access detailed documentation for ATD, Chilled Beam, and AHU fan systems from the developer.

**Highlights:** Air flow calculation, Pressure calculation, ATD fan product documentation, Chilled Beam fan product documentation, AHU fan product documentation, Intelligent Air-Technology solutions

**Features:** macOS Compatibility

**In-app purchases:** none


### Regin

[App page](https://appshunter.io/ios/app/regingo/id6448982806)

**In-app purchases:** none


## Frequently asked questions

### Is FläktGroup K Factor free?

FläktGroup K Factor is free to download, with no in-app purchases.

### Is Regin free?

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

### Do FläktGroup K Factor or Regin have ads?

Neither FläktGroup K Factor nor Regin shows ads.

### Which is updated more often, FläktGroup K Factor or Regin?

FläktGroup K Factor ships an update every 6 months, and Regin every 6 months. Most recently, FläktGroup K Factor was updated on June 5, 2026 and Regin on September 7, 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.*