The Fly Delta Android app has gotten a cool little update with a few new features, some of which you can use every time you fly, and some we hope you never have to use. Probably the most useful addition is the ability to pay for checked bags when check in on the app -- a necessary evil, unfortunately, but at least Delta's making it easier. And under the "hope you never have to use it" category is the ability to track your checked baggage from your phone. Delta's also added more technical information about the planes in its fleet (very cool for airplane buffs), and expanded airport maps, transit details, weather info and Sky Club locations -- perfect for frequent travelers.
We've got download links for ya after the break.