# Castel SIP

> SIP intercom softphone for audio/video calls and remote door access. (iPhone/iPad app by Castel.)

- Source: https://appshunter.io/ios/app/castel-sip/id566301831 (this page in markdown: same URL + `.md`)
- Developer: [Castel](https://appshunter.io/developer/566301834)
- Category: Social Networking
- Price: Free
- Age rating: 4+
- Requires: iOS 15.5 · 84 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, Polish, European Spanish
- Released: 2012-10-17
- Data updated: 2026-06-09
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/castel-sip/id566301831/reviews.md

## What is Castel SIP?

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.

## Key features

- Audio and video calls
- IP intercom station integration
- Remote door opening
- Address book with favorites
- Call history
- Remote commands during calls

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/castel-sip/id566301831/reviews.md

### 1/5 — En régression

*2023-02-28, version 4.0.0*

Cette nouvelle version ne permet plus de passer par des solutions SIP gratuites ce que je faisais depuis des années !!! Énorme régression puisque je ne reçois plus les appels de mon interphone -> inacceptable …

### 5/5 — Super !

*2023-02-17, version 4.0.0*

Application très pratique pour recevoir les appels et ouvrir le portail

### 1/5 — Application instable

*2021-01-14, version 2.2.5*

Application instable sur les dernières versions d’iOS

### 5/5 — Pratique pour les appels Voip à l'étranger

*2012-11-05, version 1.0*

Pratique pour les appels Voip à l'étranger. Il suffit de se connecter sur box internet en SIP ...

### 5/5 — Super Application

*2012-10-29, version 1.0*

Très riche en fonctions audio et vidéo.
Compatible avec les autocoms et les téléphones ip
Beau graphisme
En plus elle est gratuite
Un grand bavo à CASTEL

## Frequently asked questions about Castel SIP

### What devices is Castel SIP compatible with?

Castel SIP is compatible with iPhone and iPad devices. It supports both landscape and portrait modes for various smartphone and tablet designs.

### How does Castel SIP connect to intercom stations?

Castel SIP connects to IP intercom stations like XELLIP and CAPIP. It works through Wi-Fi and cellular data (3G/4G/5G) via the Castel Cloud SIP server.

### Can I open doors with Castel SIP?

Yes, Castel SIP allows you to open doors remotely. This functionality is available during calls and through remote commands.

### Does Castel SIP have ads?

No, Castel SIP does not contain advertisements. It is a free application without any ad interruptions.

### What advanced call features does Castel SIP offer?

Castel SIP supports advanced call functionalities including loudspeaker, call transfer, and call hold. It also allows for remote commands and DTMF input during calls.

### How often is Castel SIP updated?

Castel SIP was last updated on March 13, 2026, indicating regular updates to maintain functionality and compatibility. The latest version is 5.7.0.

### What is the age rating for Castel SIP?

Castel SIP has an age rating of 4+, making it suitable for a wide range of users. It is designed for easy and intuitive use.

### Are there any restrictions on using Castel SIP with cellular networks?

Users should check their cellular operator's terms of agreement to ensure SIP calls are permitted on their network before using Castel SIP App. This is important for uninterrupted service.

## Version history (last 5 releases)

### 5.7.0 — 2026-03-13

• Favorites order is taken into account in the export file
• Quick import/export of contacts via QR code

### 5.6.0 — 2025-11-25

- Interface support for multiple incoming calls.
- Added update assistance.
- Improved handling of missed call notifications.
- Various improvements and fixes.

### 5.5.0 — 2025-06-05

Added support for multiple DTMFs.
Support for the following languages: French, English, Spanish, German, Italian, Dutch, and Polish.
Various improvements and fixes for better stability and user experience.

### 5.4.0 — 2025-03-05

Various improvements and fixes for better stability and user experience.

### 5.3.0 — 2024-11-12

Add import/export
Add ordering of favorite contacts.
various fixes ...

## Apps similar to Castel SIP

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Linphone](https://appshunter.io/ios/app/linphone/id360065638) | 3.0 (6) | Free | Social Networking |
| [BBCall: International Calling](https://appshunter.io/ios/app/bbcall-international-calling/id1606852105) | — | Free | Social Networking |
| [PimentoPhone](https://appshunter.io/ios/app/pimentophone/id1458849958) | — | Free | Social Networking |
| [PortSIP ONE](https://appshunter.io/ios/app/portsip-one/id6504066513) | — | Free | Social Networking |
| [SKYTEL UC](https://appshunter.io/ios/app/skytel-uc/id1581528245) | 5.0 (2) | Free | Social Networking |
| [STN Suite](https://appshunter.io/ios/app/stn-suite/id1609915816) | — | Free | Social Networking |

## More apps by Castel

- [Castel Virtual Card](https://appshunter.io/ios/app/castel-virtual-card/id1596446402)

All apps by Castel: https://appshunter.io/developer/566301834

## Related topics

[portsipuc](https://appshunter.io/ios/topics/portsipuc)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-09.*