Already played songs Notification!

It would be very usefull to get the app to notify the songs that you have already played! Is there a way?

… or an extra column showing time/date when last played. Perhaps the library would have to be horizontally scrollable then.

When using iPad version of DJ, I could imagine a scenario where when scrolling through the full screen library, I could swipe to the left with two fingers to see extra columns, such as the last time the song was played

Even perhaps have the option to have sort by column functionality where the column title becomes static and a tap on it sorts the tracks in that playlist/folder by that column - like A-Z with artist, album, song etc, BPM and date last played. Just an idea but I could imagine that implementation being welcomed by many users.