Subscribing happens when you make your initial purchase. Apple makes this very easy. Ever try to unsubscribe? Slightly less intuitive.
On your iOS device go to the App Store App.
Click Featured in the menues then scroll all the way to the bottom.
Click on your apple id and choose “View Apple ID”
Toward the bottom of the resulting page is a subscriptions section – Click on the “Manage” button. At this point the exact procedure is
up to the vendor but you’re close now.
