Just in time for their Met season, American Ballet Theatre is launching its own iPhone app. I just downloaded it yesterday and am already addicted. You can browse through all of the company’s upcoming performances and learn who’s dancing which night. Contact the box office, add the show to your calendar and let all of your Facebook friends and Twitter followers know when you’re going. All of the company’s latest news is right at your fingertips, along with a continually updated archive of choreographers, composers, designers and ballets since ABT’s founding in 1940. Be in the know, even when you’re on the go. There’s also a beautiful gallery of intimate backstage shots by corps member Renata Pavam. It’s just $1.99 in the iTunes Store. For more details, go to abt.org/mobile.