Key vs Zip Key
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.
Zip Key
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The ZIP KEY app is the digital key for the booked ZIP team offices or meeting rooms. The digital key is activated with one click. Hold the smartphone to the door lock and the doors up to your rental object will be opened automatically. No additional registration is necessary. To Login use the same login data of the ZIP booking platform https://zip.streamnow.ch/. The ZIP KEY App offers the following functions: - Digital key ring for rented objects - Event log of door openings - Profile data information
Screenshots
Verdict
The clearest difference is update cadence: Key at every 4 months against Zip Key's every 9 months. Zip Key's advantage is iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and device support 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.
Key ships an update every 4 months, Zip Key every 9 months. The most recent releases landed on October 2, 2026 and October 3, 2026 respectively.
| Parameter | Key | Zip Key |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 4 months — better | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Interflex Datensysteme GmbH | StreamNow |
In-app purchases
Key
No in-app purchases
Zip Key
No in-app purchases
