Comparison

OpusTel vs CB_ARC

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

CB_ARC

Features
Read full description

Mit der CB_ARC App steuern Sie Ihr Raumklima und Ihre Beleuchtung bequem über Ihr Smartphone. Passen Sie die Temperatur an, steuern Sie die Jalousien und schalten Sie das Licht in Ihren Räumen ganz einfach per Fingertipp. Auch Ihr Energiemanagement haben Sie mit der CB_ARC App stets unter Kontrolle. CB_ARC spannt den Bogen zwischen Mensch und Gebäude, indem es Ihre Umgebung intelligent und intuitiv zugänglich macht. Ein besonderes Highlight: Die App erkennt dank Beacon-Technologie den Raum automatisch, was die Bedienung noch schneller und einfacher gestaltet. Für diese Funktion ist eine spezielle Erweiterung erforderlich. Kontaktieren Sie uns für weitere Informationen. Wichtiger Hinweis: Die CB_ARC App funktioniert nur in Kombination mit einem kompatiblen Produkt der Comsys Bärtsch AG.

Screenshots

OpusTel4 screens
CB_ARC4 screens

Verdict

The call

The clearest difference is update cadence: CB_ARC at fortnightly 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, CB_ARC fortnightly. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

Scorecard1 real difference · 9 level
OpusTel versus CB_ARC: the parameters behind the verdict, then further details
ParameterOpusTelCB_ARC
PriceFreeFree
Rating5.0 (7 ratings) — better—
Positive reviews80.0% of reviews—
Number of ratings7 — better—
Update frequencyEvery 14 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone, iPad — better
Requires iOS16.0 — better16.6
Further details — not scored
Size98 MB1 MB
Age rating4+4+
DeveloperOpusTelComsys Bärtsch AG

In-app purchases

None

OpusTel

No in-app purchases

None

CB_ARC

No in-app purchases

Questions

Is OpusTel free?
OpusTel is free to download, with no in-app purchases.
Is CB_ARC free?
CB_ARC is free to download, with no in-app purchases.
Do OpusTel or CB_ARC have ads?
Neither OpusTel nor CB_ARC shows ads.
Which is updated more often, OpusTel or CB_ARC?
OpusTel ships an update every 14 months, and CB_ARC fortnightly. Most recently, OpusTel was updated on November 1, 2026 and CB_ARC on November 4, 2026.

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