Castel SIP vs CooCall
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Castel SIP
This application functions as a SIP intercom softphone, enabling users to make and receive audio and video calls from IP intercom stations on their mobile devices. It allows for communication and remote door opening, working through Wi-Fi and cellular data networks.
- Audio and video calls
- IP intercom station integration
- Remote door opening
- Address book with favorites
- Call history
- Remote commands during calls
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Castel SIP App is a SIP intercom softphone. The easy-to-use and intuitive application, allows you to make and receive audio and video calls from IP intercom stations (XELLIP, CAPIP...) on your iPhone or iPad. With Castel SIP App, you can communicate and open the door, anywhere. It works with the Castel Cloud SIP server through Wi-Fi and 3G/4G/5G. Main features: - Audio and video calls with advanced functionalities (Loudspeaker, transfer calls, hold...) - Address book with favorites - Call history - Remote commands during calls and DTMF - Support landscape and portrait mode for all smartphone and tablet designs (camera notch...) Note: Please, check your cellular operator's terms of agreement to make sure they allow SIP calls on their network before using Castel SIP App.
CooCall
This app allows users to take their office phone extension with them anywhere. Make and receive calls using your office system from cafes, airports, or abroad. It synchronizes with your enterprise phonebook and offers personalized ringtones.
- Mobile office extension
- Inbound and outbound calls
- QR code registration
- Enterprise phonebook sync
- Personalized ringtones
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CooCall is a softphone APP dedicated for ZYCOO CooVox series IP phone system. By using CooCall you may bring your office extension wherever you want. No matter in a cafe, airport, and even abroad, you'll never miss any inbound calls from the office phone system. And you may make outbound phone calls using the office phone system as well. Features: Scan QR code to register extension number. Enterprise phonebook and extension list synchronization. Personalized ring tones.
Screenshots
Verdict
The clearest difference is review sentiment: Castel SIP at 60% against CooCall's 0%. CooCall's advantage is update cadence (fortnightly vs every 4 months) and iOS requirement (13.0 vs 15.5). On price, ads, in-app purchases and monetization model 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.
Castel SIP ships an update every 4 months, CooCall fortnightly. The most recent releases landed on September 18, 2026 and October 19, 2026 respectively.
| Parameter | Castel SIP | CooCall |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.0 (1 ratings) — better |
| Positive reviews | 60.0% of reviews — better | 0.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.5 | 13.0 — better |
| Further details — not scored | ||
| Size | 84 MB | 10 MB |
| Age rating | 4+ | 17+ |
| Developer | Castel | ZYCOO CO LTD |
Customer experience
Castel SIP
CooCall
In-app purchases
Castel SIP
No in-app purchases
CooCall
No in-app purchases
