# SGS Doorcontrol vs Envac ReFlow

The clearest difference is update cadence: Envac ReFlow at every 6 days against SGS Doorcontrol's every 36 months. SGS Doorcontrol's advantage is iOS requirement (12.0 vs 15.1). On price, ads, 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.

SGS Doorcontrol ships an update every 36 months, Envac ReFlow every 6 days. The most recent releases landed on October 26, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | SGS Doorcontrol | Envac ReFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 6 days** |
| Size | 15 MB | 66 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stift Goteborgs Studentbostader Med Firma Stift](https://appshunter.io/developer/863901888) | [Envac AB](https://appshunter.io/developer/1315553653) |

## What reviewers say

### SGS Doorcontrol

[App page](https://appshunter.io/ios/app/sgs-doorcontrol/id1482108821)

**Features:** macOS Compatibility

**In-app purchases:** none


### Envac ReFlow

[App page](https://appshunter.io/ios/app/envac-reflow/id1600435505)

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

**In-app purchases:** none


## Frequently asked questions

### Is SGS Doorcontrol free?

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

### Is Envac ReFlow free?

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

### Do SGS Doorcontrol or Envac ReFlow have ads?

Neither SGS Doorcontrol nor Envac ReFlow shows ads.

### Which is updated more often, SGS Doorcontrol or Envac ReFlow?

SGS Doorcontrol ships an update every 36 months, and Envac ReFlow every 6 days. Most recently, SGS Doorcontrol was updated on October 26, 2026 and Envac ReFlow on October 30, 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.*