Comparison

OpusTel vs ClouFON

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

Head to head
About

OpusTel

This app provides a real Swiss international telephone number for secure VoIP calls on iOS devices. It offers HD audio quality, free global calls between users, and call recording capabilities, all with a focus on user privacy.

Highlights
  • Real Swiss international telephone number
  • Secure VoIP calls
  • HD high-definition audio quality
  • Free global calls between users
  • Call recording
  • Conference calls
  • Automatic language selection
Read full description

OpusTel OpusTel is the mobile phone App for iPhone, iPod and iPad, permitting one to use a real Swiss international telephone number, e.g. 0041 41 520 60 00. It allows one to make and to receive secure VoIP calls from any iOS device using 5G/4G/3G/UMTS or Wi-Fi Internet connectivity. It was developed with the focus on privacy. Features: 1. Secure incoming and outgoing calls 2. Incomming calls are free of charge (no roamingcosts) 2. HD high-definition audio quality with the G722 and Opus codec 3. Free global calls from OpusTel to OpusTel 4. Easy transfer calls to any telephone number 5. Ability to record incoming and outgoing calls 6. Conference calls 7. Automatic language selection based on handy language (15 languages like EN, DE, CN, FR, ES, IT ...)

About

ClouFON

Read full description

Die ClouFON App ermöglicht Ihnen, weltweit zu telefonieren, von zu Hause oder unterwegs, ohne zusätzlichen Vertrag, ohne Vertragsbindung und ohne zusätzliche SIM-Karte. Nutzung der App Um die App zu nutzen müssen Sie sich zuvor registrieren und verifizieren. Sie erhalten danach einen Benutzernamen und ein Passwort und einen QR Code. Geben Sie den Benutzernamen und das Passwort in der App ein oder scannen Sie den QR Code. Mit dem Benutzernamen und Passwort können Sie sich auch auf unserer Webseite anmelden und Ihre Daten einsehen, ändern Sie nach dem ersten Login Ihr Passwort. Handhabung Mit der ClouFON App, telefonieren Sie wie herkömmlich über Ihr Smartphone. Die Nutzung der gespeicherten Kontakten ist ebenso möglich, wie die Wahlwiederholung. Damit Sie die ClouFON App benutzen können, muss Ihr Smartphone mit dem Internet verbunden sein. Dies kann ein WLAN oder Mobilfunk Netzwerk sein.

Screenshots

OpusTel4 screens
ClouFON4 screens

Verdict

The call

The clearest difference is update cadence: ClouFON at every 6 months against OpusTel's every 14 months. 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

OpusTel ships an update every 14 months, ClouFON every 6 months. The most recent releases landed on November 1, 2026 and November 12, 2026 respectively.

Scorecard1 real difference · 9 level
OpusTel versus ClouFON: the parameters behind the verdict, then further details
ParameterOpusTelClouFON
PriceFreeFree
Rating5.0 (7 ratings) — better—
Positive reviews80.0% of reviews—
Number of ratings7 — better—
Update frequencyEvery 14 monthsEvery 6 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS16.016.0
Further details — not scored
Size98 MB107 MB
Age rating4+17+
DeveloperOpusTelMDTel GmbH

In-app purchases

None

OpusTel

No in-app purchases

None

ClouFON

No in-app purchases

Questions

Is OpusTel free?
OpusTel is free to download, with no in-app purchases.
Is ClouFON free?
ClouFON is free to download, with no in-app purchases.
Do OpusTel or ClouFON have ads?
Neither OpusTel nor ClouFON shows ads.
Which is updated more often, OpusTel or ClouFON?
OpusTel ships an update every 14 months, and ClouFON every 6 months. Most recently, OpusTel was updated on November 1, 2026 and ClouFON on November 12, 2026.

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