Key vs Symphonie Connect
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Key
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.
- Smartphone as mobile ID
- Convenient door opening
- Secure credential transfer
- iPhone integration
- Requires Interflex software
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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.
Symphonie Connect
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Symphonie Connect vous permet de bénéficier de toute la téléphonie d’entreprise en un seul service, où que vous soyez. L'application prend entièrement en charge la technologie PUSH, ce qui permet à votre appareil d'être inactif lorsqu'il n'est pas utilisé et économiser la vie de la batterie. Lorsque vous recevez un appel entrant sur votre poste de travail, votre appareil se "réveille" et vous avertit comme s'il s'agissait d'un appel GSM normal. Les avantages de Symphonie Connect incluent: - La réception et l’émission d’appels sur votre smartphone depuis votre extension de bureau - Organisez vos contacts favoris pour ne pas perdre de temps - Vous avez la liberté de vous déplacer selon les exigences de votre entreprise sans stress supplémentaire, car votre téléphone de bureau vous accompagne
Screenshots
Verdict
The clearest difference is iOS requirement: Symphonie Connect at 15.0 against Key's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 4 months. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.
| Parameter | Key | Symphonie Connect |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 4 months | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod, Apple Watch — better | iPhone, iPod |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 93 MB |
| Age rating | 4+ | 4+ |
| Developer | Interflex Datensysteme GmbH | Stella Telecom |
In-app purchases
Key
No in-app purchases
Symphonie Connect
No in-app purchases
Questions
Is Key free?
Is Symphonie Connect free?
Do Key or Symphonie Connect have ads?
Which is updated more often, Key or Symphonie Connect?
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