Requirements for participants - must they have Acrobat Connect Pro for meetings?

I am soon participating in a "eLearning" program and we have been told that the meetings are within "Adobe Acrobat Connect Pro Meeting".

It is not clearly stated anywhere if I need to subscribe and have this program installed myself or if it is actually only the host that needs the program.

Is having Adobe Acrobat Connect Pro Meeting installed/subscribed a requirement for the participants?

Thanks for any help - hope Adobe will state this much clearer on their webpages in the future.