Can I make an iPhone/Apple Application which changes the users setting preferences?

Hi, I had an amazing app idea -which I won't share with you because I don't want it to be taken. This idea, will change the users setting if they press a button is this possible?

(I'm learning xcode and sdk soon I'm just coming up with some ideas.)

No. The user's settings belong to the user and an app would not be allowed to access them and change them.

See App Sandbox section here…

http://developer.apple.com/...nment.html

I don't know really know but i'm sure you could do it on android. You can watch the new boston iphone tutorials.