This chat app itself is useless without a working instance of BlaB! AX, BlaB! AX Pro, BlaB! WS or BlaB! WS Pro. Scan the QR code provided by the owner of the site and join the chat.
If the site owner provides a non-SSL URL (http instead of https) you will experience error: CLEARTEXT NOT PERMITTED on Android 9 and above. Contact the site owner and explain the problem.
Permissions
The app lists phone, microphone, storage and camera. You only need to enable camera when prompted in order to scan the QR code.
Website: https://justblab.com
The source code is on GitHub: https://github.com/uuencode/BlaB-Q