A free program for Android, by Aymeric Moizard.

“Voip By Antisip” is a VoIP and video softphone based on SIP protocol.

The app allows you to make calls and video calls over the internet using your Android smartphone or tablet. The app can also be used as a video-enabled softphone for other devices, such as Windows Phone, iOS, macOS, and Android TV.

This application is free and works in the background. The background service is used to keep the application running even when the phone is off or the power is turned off.

If you have a beta version, then the application is not officially released and the version number will not be updated. To get the latest version, you need to subscribe to the community.