You don't need to download an app and you don't need a password to enter the BBB rooms. Just click on the icon for the BBB room (Room A/C, Room B, or Q & A Room) that you would like to join. You will be asked to join with your microphone or headset only. If you select the microphone you will enter the room muted. You can learn more about BBB by watching the videos and reading the Tips page linked to below.