# N4 Building Concierge vs DOM Service

The clearest difference is device support: DOM Service at 2 against N4 Building Concierge's —. N4 Building Concierge's advantage is iOS requirement (12.0 vs 15.0). On price 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.

## The numbers

| Metric | N4 Building Concierge | DOM Service |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | — | Every 2 months |
| Size | 38 MB | 90 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | — | **iPhone, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [TopLife Concierge](https://appshunter.io/developer/1486786834) | [DOM Sicherheitstechnik GmbH & Co. KG](https://appshunter.io/developer/1557896636) |

## What reviewers say

### N4 Building Concierge

[App page](https://appshunter.io/ios/app/n4-building-concierge/id1628815663)

**In-app purchases:** none


### DOM Service

[App page](https://appshunter.io/ios/app/dom-service/id1630356411)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is N4 Building Concierge free?

N4 Building Concierge is free to download, with no in-app purchases.

### Is DOM Service free?

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

---

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