This app allows voice- and videocommunication without any server or Internet access. Simply scan each others contact QR-Code and call each other. This works on most networks such as community networks or even company networks.
Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.Download F-Droid
This version requires Android 4.4 or newer.
It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.