Comparison

Key4Friends vs Symphoni

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Receive digital door keys
  • Open and close authorized doors
  • Secure key distribution
  • Easy friend sharing
  • Email and SMS verification
Features
Read 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.

About

Symphoni

Features
Read 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

Key4Friends4 screens
Symphoni4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Key4Friends ships an update every 9 months, Symphoni every 2 months. Both last shipped on October 10, 2026.

Scorecard2 real differences · 6 level
Key4Friends versus Symphoni: the parameters behind the verdict, then further details
ParameterKey4FriendsSymphoni
PriceFreeFree
Positive reviews9.1% of reviews—
Update frequencyEvery 9 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.015.0 — better
Further details — not scored
Size61 MB86 MB
Age rating4+4+
DeveloperSimonsVoss Technologies GmbHSkyresponse AB

In-app purchases

None

Key4Friends

No in-app purchases

None

Symphoni

No in-app purchases

Questions

Is Key4Friends free?
Key4Friends is free to download, with no in-app purchases.
Is Symphoni free?
Symphoni is free to download, with no in-app purchases.
Do Key4Friends or Symphoni have ads?
Neither Key4Friends nor Symphoni shows ads.
Which is updated more often, Key4Friends or Symphoni?
Key4Friends ships an update every 9 months, and Symphoni every 2 months. Most recently, Key4Friends was updated on October 10, 2026 and Symphoni on October 10, 2026.

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