How to find the apps installed in iPhone

Question

I am developing an application in which I need to find the apps which are already installed in iPhone device such as Skype, facebook. I need to check it. Please give me code

Answer 1

I don't think it's possible, as a result of being sandboxed into your own application's environment.

And I'm referring to applications in general, not applications made by you (as BoltClock mentioned), since you're referring to the facebook and skype apps, which I imagine aren't yours.