If you mastered the routine in Nickel Buddy's original Anywhere Abs fitness application for BlackBerry you'll want to check out their newly-released next installment, Anywhere Abs 2: Core Edition. This edition features six now exercises focused on building up your core, which are broken out step by step. At any time you can pull up a detailed explanation of each exercise and the app features a countdown time and three different levels of difficulty.
As I said in my post to the original Anywhere Abs, just having it installed on your device is a good thing... never mind actually it, but just seeing the icon on the homescreen everytime you check your email forces you to sit or stand a little straighter and flex those abs. It sells for $2.99 and you can grab it at the link below.