# Key

> Mobile ID card for secure door access using your smartphone. (iPhone/iPad app by Interflex Datensysteme GmbH.)

- Source: https://appshunter.io/ios/app/key/id1150331435 (this page in markdown: same URL + `.md`)
- Developer: [Interflex Datensysteme GmbH](https://appshunter.io/developer/1150331434)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 18 MB
- Languages: English, German
- Released: 2016-09-22
- Data updated: 2026-06-07
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/key/id1150331435/reviews.md

## What is Key?

Your smartphone as a mobile ID card: With the Interflex app "Key", you can conveniently open doors with your iPhone.
 
This is how "Key" works:
- Install the app on your iPhone.
- Register the app with your access data.
- Book with your iPhone to open doors.
 
Thanks to "NetworkOnMobile" technology, we ensure encrypted and secure transfer of the mobile credential to your iPhone.
 
Important: The use of this app requires the use of the Interflex software IF-6040 and suitable badge readers.

## Key features

- Smartphone as mobile ID
- Convenient door opening
- Secure credential transfer
- iPhone integration
- Requires Interflex software

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/key/id1150331435/reviews.md

### 5/5 — Geofencing

*2020-07-25, version 1.7.4*

ok

### 5/5 — Update Key App

*2020-04-14, version 1.7.0*

Haben das System und die App im Einsatz. Geofence eingerichtet, hat Türe freigeschaltet ohne iPhone in Hand zu haben. Perfekt

## Frequently asked questions about Key

### How does Key work?

Key allows you to use your iPhone as a mobile ID card. After installing and registering the app with your access data, you can book with your iPhone to open doors. This utilizes secure, encrypted transfer of mobile credentials.

### What are the system requirements for Key?

To use Key, you must have the Interflex software IF-6040 installed and compatible badge readers. The app itself is available for iPhone, iPod, and Apple Watch.

### Is Key secure?

Yes, Key uses "NetworkOnMobile" technology to ensure encrypted and secure transfer of your mobile credential to your iPhone, providing a safe way to access secured areas.

### What devices does Key support?

Key is supported on iPhone, iPod, and Apple Watch devices, allowing for versatile use across different Apple products.

### When was Key last updated?

The latest version of Key, 2.4.0, was last updated on April 8, 2026. This indicates a recent update for the application.

### What is the age rating for Key?

Key has an age rating of 4+, making it suitable for a wide range of users. This rating suggests it contains no mature content.

### Does Key have ads?

No, Key does not contain advertisements. The app is free to download and use without any ad interruptions.

## Version history (last 5 releases)

### 2.4.0 — 2026-04-08

- Support of Apple Wallet
- Bug fixes

### 2.0.1 — 2025-02-27

- Usability Update UI
- Communication certification change
- Bugfix

### 1.9.1 — 2024-07-11

- Logging functionality.
- Settings can be configured from server and transferred to the app.

### 1.8.4 — 2024-02-14

The ID card layout can be created in the server and transferred to the app.

### 1.8.3 — 2023-08-24

- Improvement of the Credential-Card Layout
- Automatic credential selection

## Apps similar to Key

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [uCreate NFC](https://appshunter.io/ios/app/ucreate-nfc/id1571015803) | 5.0 (6) | Free | Utilities |
| [Jamf Unlock](https://appshunter.io/ios/app/jamf-unlock/id1548795059) | 5.0 (6) | Free | Utilities |
| [ACMP](https://appshunter.io/ios/app/acmp/id1476401886) | — | Free | Utilities |
| [Mäin Offall – Meng Ressourcen](https://appshunter.io/ios/app/main-offall-meng-ressourcen/id1543016592) | — | Free | Utilities |
| [LuxRoads](https://appshunter.io/ios/app/luxroads/id1006724365) | 5.0 (7) | Free | Utilities |
| [POST Parcels & Mail](https://appshunter.io/ios/app/post-parcels-and-mail/id1638750103) | — | Free | Utilities |

## More apps by Interflex Datensysteme GmbH

- [SP-Expert Connect](https://appshunter.io/ios/app/sp-expert-connect/id1553896243)

All apps by Interflex Datensysteme GmbH: https://appshunter.io/developer/1150331434

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-07.*