I have an amazing idea for apple.I am willing to give it to them.i tried feedback so is their any other way

Apple will not accept unsolicited ideas for legal reasons. It's the same in the film industry - if you send an unsolicited script to a film company they will return it unread, because if they read it and return it unaccepted, then later there's a film with some similarity to the script a lawsuit (even if unjustified) is likely to follow. If you've got a brilliant idea for an app develop it yourself or look for an independent company to partner you in developing it. Apple don't want to know.

In addition to Roger's comments, don't forget that most apps are not Apple's apps at all. Apple provide a few built in apps, but almost everything in the app store has been developed by those independent third parties that Roger mentions.