I am proud to announce the completely renewed Android Intercom.
There is no more separation between Bluetooth and WiFi. Both technologies are managed on the same screen. And all can talk each other.
Now there are 5 voice detection levels that should fit your environment noise. Voice detection is now the favorite input method but PTT is still present. If enabled there will be shown a PTT button on the bottom of the screen and volume buttons will work as PTT buttons too.
A "Donate" option is now in the menu for those of you who want to help.

As always, you can report at support@androidintercom if you have problems or need some help.

Enjoy it!