CallOne Softphone vs Petra
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CallOne Softphone
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CallOne's begleitende Softphone-App zur CallOne-Plattform. Eine SIP-Softphone-App, die Push-Benachrichtigungen, HD-Voice und Video und vieles mehr unterstützt. Darüber hinaus bietet die CallOne-App - Kostenlose Anrufe zwischen App-Nutzern
Petra
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Split your costs with friends and family
Screenshots
Verdict
The clearest difference is update cadence: Petra at every 5 weeks against CallOne Softphone's every 3 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
CallOne Softphone ships an update every 3 months, Petra every 5 weeks. The most recent releases landed on September 21, 2026 and September 11, 2026 respectively.
| Parameter | CallOne Softphone | Petra |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 97 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | CallOne GmbH | Mathias Palm |
In-app purchases
CallOne Softphone
No in-app purchases
Petra
No in-app purchases
