how to copy purchased apps from ipad to iphone

Transfer them to iTunes and sync them to the phone or go to the Purchased Tab in the App Store on the phone - and download them again directly on the phone. You do not have to pay again as long as you use the same Apple ID.

You have to make sure that you are running the necessary iOS on the phone required for the app or the app will not work on the phone.

you don't copy them. you redownload them from iTunes.

How do you transfer them to itunes? it's not happening automatically when I sych.

See if this helps.

Transfer purchases.

http://support.apple.com/kb/HT1848