Port Android App to iOS

Hi, What budget would it require to have you port my Android "Diary with lock" app to iOS? Please see: https://play.google.com/store/apps/details?id=com.adpog.diary&hl=en No all features need to be ported. Minimum version should include - Splash - Note list - Write/edit Note -- Signup -- Login -- Forgot Password -- Change Password -- Delete Account -- About this app -- Personalize (change background and font-color) -- Configure code lock -- Export entries to flat .txt file (for sharing with email)