# Key vs myDOOR Dierre

The clearest difference is review sentiment: Key at 100% against myDOOR Dierre's 20%. myDOOR Dierre's advantage is update cadence (every 2 months vs every 4 months) and iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Key ships an update every 4 months, myDOOR Dierre every 2 months. The most recent releases landed on October 18, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Key | myDOOR Dierre |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 18 MB | 40 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Interflex Datensysteme GmbH](https://appshunter.io/developer/1150331434) | [Dierre Spa](https://appshunter.io/developer/450736225) |

## What reviewers say

### Key

[App page](https://appshunter.io/ios/app/key/id1150331435)

Transform your iPhone into a mobile ID card for convenient door access. Securely register your credentials and use your phone to open doors, leveraging advanced encrypted transfer technology.

**Highlights:** Smartphone as mobile ID, Convenient door opening, Secure credential transfer, iPhone integration, Requires Interflex software

**In-app purchases:** none


### myDOOR Dierre

[App page](https://appshunter.io/ios/app/mydoor-dierre/id1545899347)

Control your door lock remotely using Bluetooth Low Energy technology. Manage settings, grant access, and open or close your door with an intuitive smartphone interface.

**Highlights:** Remote door lock control, Bluetooth LE connectivity, Access management, Guest profile management, Key-Fob radio control, Open and close door

**In-app purchases:** none


## Frequently asked questions

### Is Key free?

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

### Is myDOOR Dierre free?

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

### Do Key or myDOOR Dierre have ads?

Neither Key nor myDOOR Dierre shows ads.

### Which is updated more often, Key or myDOOR Dierre?

Key ships an update every 4 months, and myDOOR Dierre every 2 months. Most recently, Key was updated on October 18, 2026 and myDOOR Dierre on October 15, 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.*