Odds are that you weren't riveted by Beats Music when it first arrived, but the streaming service has just delivered a pair of big updates that may give you a good excuse to tune in. For the iOS app, the biggest improvement is visible when you're signing up -- you can now subscribe from within the software rather than heading to the web. The move makes it that much easier to keep the music flowing after your trial is over, and may just help Beats grow its fledgling customer base.Not that Beats is neglecting its Android app by any means; you get a "brand spanking new widget" for your home screen if you're running Google's mobile platform. Both the Android and iOS releases also share some common improvements, including the ability to find Facebook friends who use Beats, better social network linking and thousands of new tracks in the Sentence playlist generator. There's no guarantee that either refresh will have you rethinking that Rdio or Spotify subscription, but it's hard to knock upgrades that make it easy to start listening.