Key4Friends vs CISA Smart Access
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Key4Friends
Easily and securely share access to doors with friends and family. Receive authorizations from the MobileKey app to open and close designated doors directly from your smartphone. Requires an internet connection for operation.
- Receive digital door keys
- Open and close authorized doors
- Secure key distribution
- Easy friend sharing
- Email and SMS verification
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Safe distribution of keys among friends has never been easier: the Key4Friends app receives keys which the owner wishes to share with you from the MobileKey app. The function is quickly explained: the owner of the door sends you an authorisation for one or more doors over the MobileKey web app. You can then open and close the doors concerned using the Key4Friends app. Key4Friends is quick, easy, safe and free to install. You will only be asked for your email during registration. We will then send you a code by text message to check registration. No password is required thanks to the distinct connection between the SIM card and the email address. Important: your smartphone needs to be connected to the Internet to open or close a door with the Key4Friends app. This means that there may be charges, depending on the contract with the operator. Don't worry, though β the amount of data sent is minimal. SimonsVoss Technologies GmbH hopes you have fun sharing keys safely and securely.
CISA Smart Access
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CISA Smart Access is the app that allows you to access your hotel room, residence or workplace with your smartphone. To obtain the digital key, simply click on the link you will receive from the facility manager. The digital key is securely stored within the app and once downloaded it can be used to open a door even without an internet connection. With the app you can access any type of gate, from the parking lot, to the entrance to the room, office and service areas. To use the key, simply approach the gate and click the padlock image that appears on the main screen. You can download digital keys for more than one facility at the same time and check the list of authorized doors at any time. CISA, a brand of Allegion, is one of Europeβs leading providers of security and access control systems. Since its foundation in 1926, it plays a primary role in satisfying the security requirements of any type of building with dedicated electro-mechanical solutions, which enable real-time access control and management. Whether itβs residential homes or business centers, schools or health and hospitality facilities, safety is our main concern. For more, visit cisa.com; YouTube; LinkedIn and Facebook.
Screenshots
Verdict
The clearest difference is update cadence: CISA Smart Access at every 3 months against Key4Friends's every 9 months. CISA Smart Access also leads on iOS requirement (14.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Key4Friends ships an update every 9 months, CISA Smart Access every 3 months. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.
| Parameter | Key4Friends | CISA Smart Access |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 9.1% of reviews | β |
| Update frequency | Every 9 months | Every 3 months β better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | β |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 26.0 | 14.0 β better |
| Further details β not scored | ||
| Size | 61 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | SimonsVoss Technologies GmbH | CISA S.p.A. |
In-app purchases
Key4Friends
No in-app purchases
CISA Smart Access
No in-app purchases
Questions
Is Key4Friends free?
Is CISA Smart Access free?
Do Key4Friends or CISA Smart Access have ads?
Which is updated more often, Key4Friends or CISA Smart Access?
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