What are you talking about...? > On iOS 11, Safari View Controller will have a separate persistent data store in each app that it’s used in. This means that cookies, local storage, and other browsing data will be contained within your app and scoped to your app. And this means that the user won’t automatically be logged in to whatever accounts they were logged into in Safari. https://blog.fenrir-inc.com/jp/2017/07/ios11-safari-view-controller.html