I've been using JamKazam over the past year and have tolerated the kludgy app to at least be able to play duos, because it was better than trying to use FaceTime or Zoom for simultaneous sounds and also, because it was free. Now the powers at be have enabled a subscription model where the free plan only gets 4 hours a month - that sucks. Hopefully one of the tech giants like Google and FaceBook will take on this niche and do it right.