Key4Friends vs Symphoni
Price, ratings, monetisation and update history for both apps, side by side — 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
Read full descriptionHide full description
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 – the amount of data sent is minimal. SimonsVoss Technologies GmbH hopes you have fun sharing keys safely and securely.
Symphoni
Read full descriptionHide full description
Med appen Telenta Symphoni skapar du en snabb och effektiv larmhantering där larm sänds direkt till den som har möjlighet att agera, utan inblandning av någon larmcentral. Larmmottagarna ser alla inkommande larm på sina mobiltelefoner i form av en larmlista med både kart- och navigationsstöd. Det här är en trygg, enkel och kostnadseffektiv lösning, t.ex. när det är naturligt att kollegor griper in och gör den första åtgärden.
Screenshots
Verdict
The clearest difference is update cadence: Symphoni at every 2 months against Key4Friends's every 9 months. Symphoni also leads on iOS requirement (15.0 vs 26.0). 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.
Key4Friends ships an update every 9 months, Symphoni every 2 months. Both last shipped on October 10, 2026.
| Parameter | Key4Friends | Symphoni |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 9.1% of reviews | — |
| Update frequency | Every 9 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 61 MB | 86 MB |
| Age rating | 4+ | 4+ |
| Developer | SimonsVoss Technologies GmbH | Skyresponse AB |
In-app purchases
Key4Friends
No in-app purchases
Symphoni
No in-app purchases








