WebView looses stored Login data after App Exit (iOS)

Hi,

i have a webview that leads to a page of mine where Users LOGIN with their UserID/Password

When I close the App completly on Android and start it again, opening the WebView, the User is still loggedIN

Instead on iOS, when I open the WebView again after the app came closed, the User has to Loggin again.

That can be very nerving, always to login when the app came closed.

Any Ideas why that (even different on iOS/Android) and how to fix it!?

Thanks

Chris