# Castel SIP vs Capaz

The clearest difference is in-app purchases: Castel SIP at none against Capaz's 10. Capaz's advantage is update cadence (fortnightly vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Capaz sells 10 in-app purchases, starting at $3.99 per month. Castel SIP asks for nothing beyond the download.

Castel SIP ships an update every 4 months, Capaz fortnightly. The most recent releases landed on September 18, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Castel SIP | Capaz |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 84 MB | 123 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Castel](https://appshunter.io/developer/566301834) | [stephane rix](https://appshunter.io/developer/1764280025) |

## What reviewers say

### Castel SIP

[App page](https://appshunter.io/ios/app/castel-sip/id566301831)

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.

**Highlights:** Audio and video calls, IP intercom station integration, Remote door opening, Address book with favorites, Call history, Remote commands during calls

**Features:** macOS Compatibility

**In-app purchases:** none


### Capaz

[App page](https://appshunter.io/ios/app/capaz/id6742909082)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic plan - 4 personnes | $3.99 | per month |
| Basic plan - 5 personnes | $4.99 | per month |
| Basic plan - 6 personnes | $5.99 | per month |
| Basic plan - 7 personnes | $6.99 | per month |
| Basic plan - 8 personnes | $7.99 | per month |
| Big plan - 4 personnes | $8.99 | per month |
| Big plan - 5 personnes | $11.99 | per month |
| Big plan - 6 personnes | $12.99 | per month |
| Big plan - 7 personnes | $12.99 | per month |
| Big plan - 8 personnes | $14.99 | per month |


## Frequently asked questions

### Is Castel SIP free?

Castel SIP is free to download, with no in-app purchases.

### Is Capaz free?

Capaz is free to download, with in-app purchases available.

### Do Castel SIP or Capaz have ads?

Neither Castel SIP nor Capaz shows ads.

### Which is updated more often, Castel SIP or Capaz?

Castel SIP ships an update every 4 months, and Capaz fortnightly. Most recently, Castel SIP was updated on September 18, 2026 and Capaz on October 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*