# STN UC

> SIP-based softphone for calls and instant messaging with push notifications. (iPhone/iPad app by PortSIP Solutions, Inc..)

- Source: https://appshunter.io/ios/app/stn-uc/id1569753155 (this page in markdown: same URL + `.md`)
- Developer: [PortSIP Solutions, Inc.](https://appshunter.io/developer/426903821)
- Category: Social Networking, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 11.0 · 54 MB
- Languages: Russian, American English, European Spanish, Italian, Korean, German (Germany), Polish, Brazilian Portuguese, Chinese (Simplified, China), French (France) and 1 more
- Released: 2021-06-09
- Data updated: 2026-08-20
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/stn-uc/id1569753155/reviews.md

## What is STN UC?

STN-UC is a SIP-based softphone for iPhone that uses Wi-Fi or 4G/LTE connection to make and receive calls and Instant Messages.

Interworking with PortSIP PBX, STN-UC support push notification, which allows it receive calls and messages even it was force terminated.

## Key features

- SIP-based softphone
- Wi-Fi or 4G/LTE calls
- Instant messaging
- Push notifications for calls
- Push notifications for messages
- Interworks with PortSIP PBX

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/stn-uc/id1569753155/reviews.md

### 1/5 — Sign up

*2024-12-28*

No provision to sign up and use the network

## Frequently asked questions about STN UC

### What is STN UC?

STN UC is a SIP-based softphone application for iPhone that allows you to make and receive calls and send instant messages using your Wi-Fi or 4G/LTE connection. It is designed to work with the PortSIP PBX system.

### Does STN UC support push notifications?

Yes, STN UC supports push notifications when interworking with PortSIP PBX. This means you can receive calls and messages even if the application has been force terminated or is running in the background.

### What devices is STN UC compatible with?

STN UC is compatible with iPhone and iPod devices. It requires iOS to function.

### How often is STN UC updated?

The latest version, 2.6.2, was released on October 23, 2024. The app is actively maintained by PortSIP Solutions, Inc.

### Is STN UC free to use?

Yes, STN UC is available for free. There are no in-app purchases or advertisements associated with the application.

### What is the age rating for STN UC?

STN UC has an age rating of 4+. This indicates it is suitable for users of all ages.

### Can STN UC be used without a PortSIP PBX?

While STN UC is a SIP-based softphone, its push notification functionality is specifically designed to interwork with PortSIP PBX. For optimal features, use with a compatible PBX is recommended.

## Version history (last 5 releases)

### 2.6.2 — 2024-10-23

improved stability.

### 2.6.1 — 2024-10-23

improved stability

### 2.6.0 — 2024-05-07

improved stability

### 2.5.9 — 2024-01-28

Bug fixes and improvements.

### 2.5.8 — 2024-01-26

1. Prioritize the use of IPV4.
2. Fixed the bug of button flashing when using Bluetooth headsets.
3. Fixed the bug of incomplete playback of recording prompts.
4. Re-implementation of status function
5. app does not match system contact with call number

## Apps similar to STN UC

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Castel SIP](https://appshunter.io/ios/app/castel-sip/id566301831) | — | Free | Social Networking |
| [Linphone](https://appshunter.io/ios/app/linphone/id360065638) | 2.6 (8) | Free | Social Networking |
| [Grandstream Wave](https://appshunter.io/ios/app/grandstream-wave/id1523254549) | 2.6 (50) | Free | Social Networking |
| [PimentoPhone](https://appshunter.io/ios/app/pimentophone/id1458849958) | — | Free | Social Networking |
| [VaxPhone - SIP based softphone](https://appshunter.io/ios/app/vaxphone-sip-based-softphone/id894003707) | 5.0 (1) | Free | Social Networking |
| [SessionTalk SIP Softphone](https://appshunter.io/ios/app/sessiontalk-sip-softphone/id362501443) | 4.5 (998) | Free | Social Networking |

## More apps by PortSIP Solutions, Inc.

- [PortSIP UC](https://appshunter.io/ios/app/portsip-uc/id426903818)
- [1-Talk](https://appshunter.io/ios/app/1-talk/id639536802)
- [IPTalker](https://appshunter.io/ios/app/iptalker/id666238043)
- [VOM](https://appshunter.io/ios/app/vom/id1273960465)
- [WIFI-TV](https://appshunter.io/ios/app/wifi-tv/id1274348695)
- [Mondex Phone](https://appshunter.io/ios/app/mondex-phone/id1464834278)

All apps by PortSIP Solutions, Inc.: https://appshunter.io/developer/426903821

## Related topics

[portsip uc](https://appshunter.io/ios/topics/portsip-uc) · [portsip](https://appshunter.io/ios/topics/portsip) · [smartcomm uc mobile](https://appshunter.io/ios/topics/smartcomm-uc-mobile)

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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 2026-08-20.*