I wrote my first Android app — a chord transposer. Usually when I’m writing a song I take out a pad and write down the chords I’m using, then try out the same progression in different keys according to what’s suitable for my voice. Since I do this so often I figured it’d be easier to create an app to do it for me. It’s simple, but it gets the job done! And faster than I can do it on paper.
Check it out on the Android market.