Shazam has a lot more competition from Siri, Cortana and other services, but the music recognition service has tried to stay on top with Google Now integration, faster recognition and other new tricks. The company has just added a feature that seems indispensable, but somehow wasn't available before: syncing across devices. As long as you're logged in to your account, it remembers any songs you identify and lets you see them from the desktop, iOS or other devices.