Ten iPhone Apps Worth Paying For

Glee is an app based on the popular Fox TV musical series Glee. It’s yet another addictive app from Smule, a company that initially burst onto the scene by turning an iPhone into an ancient flutelike instrument called an ocarina.

The instrument you use in Glee is your own voice, of course, and you get to compete globally for starbursts, which you earn every time you pretend to be, say, Sinatra, Streisand, or Freddie Mercury. You earn extra points for keeping to the melody.

If you share your songs via Twitter or Facebook, or e-mail them, you might gain a following of gleeks, as fans of the TV series are called.