I've been recording client interviews for years, since the Voice Memos app appeared, several iPhones ago. At first they'd automatically transfer from the iPhone to iMusic (with the Voice Memo genre). A couple years ago that stopped, unless you selected the "sync voice memos" option in Music. I would guess that the Mac Voice Memos app may have appeared when that sync option disappeared. Perhaps it was when iCloud music sync became common, but I don't know. Recently I've been emailing/airdropping my voice memo files to myself, to ensure that the critical interviews are backed up. Until today I had no idea that the Mac app exists. Although so far I can't seem to get my voice memos into the Mac app, so I'm not too impressed. What used to be simple and automatic is now a pain the neck, and a worry that critical files could be lost.