Every other audio ap I have stops when the phone rings, but not this one. And you can't turn it off or lower the volume before taking the call, so for the first seconds of the call, you and your caller can't speak over the broadcast, until you go through minimizing the call, pulling up the ap, and stopping. The volume control on the side of my phone only affected the call, not the radio, so no quick lowering of the volume.
Worse still, if you have an alarm set on ap that came with the iPhone, it doesn't ring through, defeating the purpose of the alarm. Idk if it does this with other ap alarms. Unfortunately, with 4 kids' schedules to keep track of, it's a deal breaker. I can't use the ap.