I added many versions of my app at appstore with Utilities as a primary category ,but now I want to add it as Lifestyle category.Can I change this category with out deleting the
The only way to do it is to submit a new version in iTunesConnect. If you are fortunate and haven't deleted the old binary, simply resubmit it. If you are out of luck like me then you will need to submit a new release. (Reason why I say out of luck is...I am 1/2 way down into the development of my next release and it is no shape to be submitted to appstore which means a month delay for me to just change the category)