Microsoft is rolling out an all new Cortana version 3.0 for iPhone and iPad devices starting today. The new version has been under beta testing for a month now, and it’s now available for every to download. The updated Cortana app brings along a sleek new user interface and conversational experience. Check out the full changelog for the update below: We’re excited to announce Cortana v3.0! This release brings new features to help you on…