A web subscription allows you access to all of Backstory’s content for one year.
At the end of a year, you will lose access to this content unless your subscription is renewed.
iPad users are allowed to download issues for offline reading. Chances are once your subscription expires, your download issues will remain available on that device for a limited time.
It would seem that once a user updates their app to the latest version, if their subscription has expired and not been renewed their downloaded issues may disappear.
For iPad users who have previously purchased individual issues – you will continue to have access to the individual issues you purchased on your iPad after your subscription expires.