Castel SIP vs SSL Quick Response
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.
SSL Quick Response
This application enables communities to swiftly report and address incidents. Users can submit safety concerns or emergencies from their phones, with automatic verification and real-time notifications to all members. This facilitates coordinated responses, improving community safety and security.
- Submit incident reports
- Automatic information verification
- Real-time community notifications
- Coordinated swift responses
- Enhanced safety and security
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This app empowers communities to report and respond to incidents quickly and efficiently. Users can easily submit reports of incidents, such as safety concerns or emergencies, directly from their smartphones. Once an incident is reported, the app automatically verifies the information and notifies all community members, ensuring everyone stays informed and prepared. This real-time communication helps communities to coordinate swift responses, enhancing safety and security for everyone involved. Ideal for neighborhood associations, residential complexes, and other community groups.
Screenshots
Verdict
The clearest difference is update cadence: SSL Quick Response at every 3 weeks against Castel SIP's every 4 months. SSL Quick Response also leads on 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, SSL Quick Response every 3 weeks. The most recent releases landed on September 18, 2026 and October 5, 2026 respectively.
| Parameter | Castel SIP | SSL Quick Response |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 60.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 months | Every 3 weeks — 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 | 28 MB |
| Age rating | 4+ | 17+ |
| Developer | Castel | Software Shop Limited |
Customer experience
Castel SIP
SSL Quick Response
In-app purchases
Castel SIP
No in-app purchases
SSL Quick Response
No in-app purchases
