Does anyone else who uses Sportacular for game updates have the same problem where even after checking an alert in the Notification Center, which then brings you to Sportacular, the alert won't go away?
AFAIK only Apple stock app can clear individual notification, 3rd-party app only have option for either clear all or nothing.
To clear all notifications, app need set the badge count to zero. For example, in app like beejiveIM or IM+, badge display unread msg, if you read all the msg the app will clear all it notifications.
In some other app, dev write it to set the badge count to 0 everytime you launch app, so the notifications will clear everytime you open the app.
Otherwise you will need clear notifications manually.
sorry for my english