ABTO Software's VoIP SIP softphone.
Can be used to call sip numbers and landline numbers (if sip provider has this option).

voice calls;
video calls;
text chat (based on SIP MESSAGE request);
works with all popual SIP servers, including Asterisk/FreeSwitch;
make direct calls between clients without SIP server;
allows to use UDP/TCP/TLS protocols for SIP transport;
ability to make secure calls using SRTP/ZRTP;
supports STUN/ICE;
IPv6 support.

What’s New

Version 3.20

- DNS-SRV support
- Blind call transfer
- Audio route selection by user and initial autodetection (bluetooth, speaker, internal)
- Button press animations

Ratings and Reviews

4.5 out of 5
2 Ratings

2 Ratings

MavericksCuba ,

Very useful

Our team use the SDK of this team and it’s very useful.
In other order, we have an issue with IPv6 and T-Mobile with the SDK that can’t register.
If you can help us, will be a great help.
Best regards.

tgwaste ,

Needs a bit more

Great for my purposes. Needs speakerphone, dark mode, full size keypad on calls and to be able to hear the touch tones when you press them.

App Privacy

The developer, Sviatoslav Volodymyruvych Litynsky Private Enterpreneur, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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