Key vs ACL App
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.
ACL App
This app provides quick and efficient assistance worldwide. It offers features like emergency calls with vehicle data, real-time traffic information, club news, and a digital membership card. Available in multiple languages, it offers enhanced benefits for club members.
- eCall mobile with vehicle data
- Real-time traffic information
- Club news and updates
- Digital membership card
- eCharging station locator
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The free application of the Automobile Club Luxembourg allows you fast and efficient assistance at any time and anywhere in the world. The ACL App has 5 main functionalities: • eCall mobile (including referencing of “my vehicles”), • Traffic Informations, • Infos & News of the Club • eCharging Station, as well as the digital Membership card. Available in French, German and English, the ACL App is accessible to everyone, while providing additional valuable benefits to ACL members. The main functionality “eCall mobile” in connection with "my vehicles" allows members of ACL to considerably shorten the process of troubleshooting. What does that mean ? Here it comes : • Record your data and those related to the vehicles you regularly use within the application. • During a call via “mobile eCall” , this data, as well as your location (if activated on your mobile), will be automatically transmitted to the Assistance Center of your Automobile Club. • In addition, the voice call from the ACL affiliate will automatically be routed to a priority phone line. • For any person not affiliated with ACL, the “eCall mobile” function allows geolocation and the call to the telephone exchange, but does not allow the preliminary registration of the vehicles or the automatic sending of geolocation information. • The “eCall mobile” functionality may also be used for any assistance-needs beside the classic road-assistance case. The “Membership card” functionality , reserved for ACL members , makes it possible to check the status of the data related to the ACL affiliation. Do you want to have a look at the actual traffic situation on Luxembourg roads? With the “Traffic Info” functionality , a map allows you to locate traffic congestion, accidents, construction sites as well as the location of fixed speed cameras. The “Info & News” functionality keeps you up to date on new developments in the world of mobility. The ACL App: for fast assistance anywhere in the world!
Screenshots
Verdict
The clearest difference is iOS requirement: ACL App at 15.6 against Key's 17.0. On price, review sentiment, update cadence and ads 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, ACL App every 3 months. The most recent releases landed on September 14, 2026 and September 27, 2026 respectively.
| Parameter | Key | ACL App |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod, Apple Watch — better | iPhone, iPod |
| Requires iOS | 17.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 18 MB | 46 MB |
| Age rating | 4+ | 17+ |
| Developer | Interflex Datensysteme GmbH | Automobile Club du Luxembourg |
Customer experience
Key
ACL App
In-app purchases
Key
No in-app purchases
ACL App
No in-app purchases









