Songkick is an app that scans your music library from iTunes, Spotify, Pandora, etc., and then tracks the concert dates of the bands you listen to. I wish I had the time to attend more concerts, but it’s super handy if you want to buy tickets early and get them at a reasonable price. The interface is great and it links directly to the the sites where tickets can be purchased. Definitely a must have for the avid concert-goer!